work, power and energy worksheet with solutions

This limitation was okay for simple tasks like pumping water or mashing potatoes, but did not work so well for moving a train. Solution [BL][OL] Review understanding of mass, velocity, and acceleration due to gravity. 6.2 Notions of work and kinetic energy : The work-energy theorem 6.3 Work 6.4 Kinetic energy 6.5 Work done by a variable force 6.6 The work-energy theorem for a variable force 6.7 The concept of potential energy 6.8 The conservation of mechanical energy 6.9 The potential energy of a spring 6.10Various forms of energy : the law of conservation . 3. 19. Units and If two bodies are at different temperatures, it is possible for energy, Q, to be transferred from that at high temperatures to that at lower without any apparent forces and displacements by which work could be done. Assuming friction is negligible, describe changes in the potential energy of a diving board as a swimmer dives from it, starting just before the swimmer steps on the board until just after his feet leave it. (b) To what maximum height can the ball be shot? In this case, is 180, for F points up and S points down. In such a situation we define the work W done by the force on the particle as the product of the magnitude of the force F and the magnitude of the displacement S through which the force acts. SLOWER time! Solution 1999-2023, Rice University. (e) 0. Work Energy Power - Worksheet problem solution (Q1) A block of mass 1 kg slides down on an inclined plane of inclination 60 degrees. (Be certain to include the weight of the person.). Supply: nofisunthi.blogspot.com 50. (b) Only a fraction of the workers lifted blocks; most were involved in support services such as building ramps (see Figure), bringing food and water, and hauling blocks to the site. Work Power And Energy Showing top 8 worksheets in the category - Work Power And Energy. Power is the time rate at which work is done. Studypool matches you to the best tutor to help you with your question. If, on the other hand,w consider the weightlifter to be a system of particles, we find that microscopically work is indeed being done a muscle is not solid support and cannot sustain a load in a static manner. Energy can take a variety of different forms, and one form of energy can transform to another. Energy, Work, and Power Page 1 of 2 WORKSHEET: POTENTIAL ENERGY PROBLEMS Fill in the Blank: 1. Click right here to free download Pdf for MCQs for Class 9 Science for essential subjects and CBSE NCERT Chapters, Download newest MCQ questions with answers for Class Give an instance of electrical energy transformed into gentle power. Lets consider an example that can help illustrate the differences among work, force, and power. Maikling Kwento Na May Katanungan Worksheets, Developing A Relapse Prevention Plan Worksheets, Kayarian Ng Pangungusap Payak Tambalan At Hugnayan Worksheets, Preschool Ela Early Literacy Concepts Worksheets, Third Grade Foreign Language Concepts & Worksheets. One of Watt's steam engines is shown in Figure 9.5. (a) Work is said to be done by a forte only when the body moves. Work, Energy and Power Muhammad Habibie Worksheet Worked examples Practical: Gravitational potential energy to kinetic energy transformation End-of-chapter test Marking scheme: Worksheet Marking scheme: End-of-chapter test Download Free PDF Related Papers SM Physics HRK 5Ed Vol 1 Fareeha pervaiz Download Free PDF View PDF Solutions Manual 6.What elements of the landscape near Georgetown, Colorado, indicate the presence of glaciers in Colorados past? (c) What is the average force of friction if the hill has a slope $\displaystyle 2.5$ above the horizontal? We have Provided Work and Energy Class 9 Science MCQs Questions with Answers to help students understand the concept very well. Discuss the practical implications of your results. 2 = In physics, the term work has a very specific definition. The ball has energy. (b) How does this time compare with historically significant events, such as the duration of stable economic systems? Kinetic Energy. (Thu) Clicker Questions: Energy uploaded to Teams after class. The manufacturers of an exercise bicycle claim that you can lose 0.500 kg of fat per day by vigorously exercising for 2.00 h per day on their machine. But remember that this chapter is fundamental to most of the chapters to come. (c) What is the work done on the cart by the shopper? (b) Calculate the force exerted by an identical blow in the gory old days when no gloves were used and the knuckles and face would compress only 2.00 cm. 36. This corresponds to an obtuse angle between the force and displacement vectors. Unit 8 - Work, Power and Energy Date Topic Homework Handouts Tuesday, Nov. 21st Block 3 - Work and Power intro Block 4 -Assembly p.199 #1 - 3; p.202 #5, 7; p.203 #9 - 11 Work and Power Notes Download File Wednesday, Nov. 22nd Block 3 - Work and Power LAB Block 4 - Work and Power intro (see above) Lab due Thursday. . Work, energy, and power are scalar quantities. It helps us to identify the changes that occur when work is done. Here we have given Class 9 NCERT Science Textbook Solutions for Chapter 11 Work Power and Energy. Download PDF. The bumper cushions the shock by absorbing the force over a distance. Units for Lets examine how doing work on an object changes the objects energy. To illustrate this, calculate how many years the present energy needs of the world could be supplied by one millionth of the oceans hydrogen fusion energy. You need to read the instructions and questions carefully in the assignment. This is not as far-fetched as it may soundthere are thousands of nuclear bombs, and their energy can be trapped in underground explosions and converted to electricity, as natural geothermal energy is. 21. A spark of static electricity, such as that you might receive from a doorknob on a cold dry day, may carry a few hundred watts of power. (b) In practice the knees bend almost involuntarily to help extend the distance over which you stop. Only 30% of the gasoline goes into useful work by the force that keeps the car moving at constant speed despite friction. Explain with the help of suitable example? A cars bumper is designed to withstand a 4.0-km/h (1.1-m/s) collision with an immovable object without damage to the body of the car. (Should work done lowering her body be included? He exerts a force of 500 N on the crate parallel to the ramp and moves at a constant speed. (a) $\displaystyle 4.6510^3kcal$ $\displaystyle 410^4$ molecules. This video explains the work energy theorem and discusses how work done on an object increases the objects KE. One kilowatt-hour is the work done in one hour by an agency whose power is one kilowatt. 35. Do not create a separate document or write a paper.Classify the contaminant as a heavy metal, harmful solvent, volatile organic compound or vapor, pesticide, or radiation.Identify the source or sources of the contaminant. so power can be expressed in units of A 75.0-kg cross-country skier is climbing a $\displaystyle 3.0$ slope at a constant speed of 2.00 m/s and encounters air resistance of 25.0 N. Find his power output for work done against the gravitational force and air resistance. (See [link] for the energy content of gasoline.). Our best tutors earn over $7,500 each month! Power is the rate at which work is done. CSULB Phenotype to Genes Chromosomes Lab Report, University of Colorado Exploring Glacial Landscapes in Google Earth Lab Report. This unit can be used to measure power related to any form of energy or work. Using a force to move something a distance If the energy in fusion bombs were used to supply the energy needs of the world, how many of the 9-megaton variety would be needed for a years supply of energy (using data from Table)? What is the cost of operating this air conditioner 3.00 h per day for 30.0 d if the cost of electricity is $0.110 per $\displaystyle kWh$? Work as the transfer of energy. Answer the following questions on a separate sheet of paper. 1 In this case, we define the work done by the force on the particle as the product of the component of the force along the line of motion and the magnitude of the displacement S. Sometimes force and displacement do not have the same direction. Initiate a discussion on the historical significance of suddenly increasing the amount of power available to industries and transportation. Required fields are marked *. Work done against these forces does not get conserved in the body in the form of P.E. 30. 7. Lifting a rock up off the ground is work because the rock is moving in the direction that force is applied. Our mission is to improve educational access and learning for everyone. If so, explain how this is accomplished without doing work. W=fd I have a biology quiz that needs to finish. Thus, work and energy are related to each other. (d) It would be impossible to maintain this power output for 2 hours (imagine sprinting for 2 hours!). In this case, rate means per unit of time. . 32. In this section, students learn how work determines changes in kinetic energy and that power is the rate at which work is done. e The first steam engines were not only inefficient, they only produced a back and forth, or reciprocal, motion. The car follows the curved track in Figure. 64. 2. What is the relationship of mechanical energy to nonconservative forces? This work is described by the equation. Showing top 8 worksheets in the category - Work Power And Energy. Do devices with efficiencies of less than one violate the law of conservation of energy? t (b) How many flights is this if each flight has 16 stairs? W=fd . Very large forces are produced in joints when a person jumps from some height to the ground. The measurement of work and energy with the same unit reinforces the idea that work and energy are related and can be converted into one another. 4. Power is the rate at which energy is transferred or transformed with respect to time. (For simplicitys sake, we will leave aside for now the fact that the man climbing the stairs has also done work on himself.). 22. [AL][AL] Remind students of the equation Identify the quantities F, d, m, v1, and v2 in this event. 2. Historians estimate that 20,000 workers spent 20 years to construct it, working 12-hour days, 330 days per year. how work power and energy related with each other, Work energy and power problems and solutions, Work energy theorem examples physicsabout, Bernoulli equation derivation with examples and applications. Work,+Energy,+Power+Unit+-+Worksheet+5+Answers.pdf - School University of Alabama; Course Title PHYSICS 101; Uploaded By AmbassadorAlligatorPerson715. 74. Work And energy Worksheet Given below are the Class 9 Science Work And energy Worksheet a. Concepts questions b. (a) Calculate the force the woman in Figure exerts to do a push-up at constant speed, taking all data to be known to three digits. (b) Discuss how the larger energies needed for the movement of larger animals would relate to metabolic rates. Assume no friction acts on the wagon. SI unit of work is the joule (J). describe and apply the workenergy theorem; calculate the mechanical energy of, power generated within, impulse applied to, and momentum of a physical system. The ball leaves your hand with a speed of 30 m/s. No matter how you move a TV to the fourth floor, the amount of work performed and the potential energy gain are the same. (a) Calculate the gravitational potential energy stored in the pyramid, given its center of mass is at one-fourth its height. You may assume her efficiency is 20%. Suppose the woman in Figure 9.3 lifting the TV with a pulley gets the TV to the fourth floor in two minutes, and the man carrying the TV up the stairs takes five minutes to arrive at the same place. (a) Calculate the magnitude of the force needed to stop the downward motion of a joggers leg, if his leg has a mass of 13.0 kg, a speed of 6.00 m/s, and stops in a distance of 1.50 cm. An object does free fall. Make it clear why holding something off the ground or carrying something over a level surface is not work in the scientific sense. Some of the worksheets displayed are Physics work work and energy, Physics work and energy work solutions, Physics work and energy work solutions, Physics in concert teacher notes and student work, Physics work momentum impulse work and energy, Skill and practice work, Physics work momentum impulse work and energy . Potential Energy. Distinguish between initial and final velocity and pay attention to the minus sign. Click on pop-out icon or print icon to worksheet to print or download. Consider a particle acted on by a constant force F, and assume the simplest case in which the motion takes place in a straight line in the direction of the force. Resolving F into its perpendicular components Fxand Fyas: In case when force and displacement are not parallel then only the x-component Fxparallel to the surface causes the body to move on the surface and they-component Fy. (a) What is the average useful power output of a person who does $\displaystyle 6.0010^6J$ of useful work in 8.00 h? The watt unit was named after James Watt (17361819) (see Figure 9.4). (d) 38.6 N (b) How much work does she do if her center of mass rises 0.240 m? 1 Example 4.1. Using energy considerations and assuming negligible air resistance, show that a rock thrown from a bridge 20.0 m above water with an initial speed of 15.0 m/s strikes the water with a speed of 24.8 m/s independent of the direction thrown. (a) How high a hill can a car coast up (engine disengaged) if work done by friction is negligible and its initial speed is 110 km/h? Work Power Energy Exam 1 and Problem Solutions; Work Power Energy Exam 2 and Problem Solutions; Work Power Energy Exam 3 and Problem Solutions; Impulse Momentum Exams and Problem Solutions. (a) Calculate the force exerted by a boxing glove on an opponents face, if the glove and face compress 7.50 cm during a blow in which the 7.00-kg arm and glove are brought to rest from an initial speed of 10.0 m/s. Work, Power and Energy Worksheet Work and Power 1. 6-12,13 -Work Wkst 2. 37. The skiers initial kinetic energy is partially used in coasting to the top of a rise. citation tool such as, Authors: Paul Peter Urone, Roger Hinrichs. 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It explains that when work is done on an object, energy is transferred from one form to another. Note that the total mass of the counterbalanced system is 10,000 kgso that only 2500 kg is raised in height, but the full 10,000 kg is accelerated. Using data from Table, calculate the approximate factor by which the power output of this astronomical object has declined since its explosion. 2 Discuss the relative effectiveness of dieting and exercise in losing weight, noting that most athletic activities consume food energy at a rate of 400 to 500 W, while a single cup of yogurt can contain 1360 kJ (325 kcal). 4. (c) 700 J $\displaystyle P=\frac{W}{t}=\frac{Fd}{t}=F(\frac{d}{t})=Fv,$ Friday, Nov. 24th Worksheets are Physics work work and energy, A guide to work energy and power, Work power and energy, Physics work and energy work solutions, Name period date, Topic 5 work and energy, Work energy problem, Work energy and power. Students learn how work determines changes in kinetic energy is transferred from one form of P.E icon Worksheet... This limitation was okay for simple tasks like pumping water or mashing potatoes, did... A discussion on the work, power and energy worksheet with solutions parallel to the minus sign one kilowatt speed... Category - work power and energy Worksheet work and energy See [ link ] for the movement of animals..., Calculate the gravitational POTENTIAL energy stored in the category - work power and Worksheet... Of gasoline. ), they only produced a back and forth, or reciprocal, motion each.! Coasting to the top of a rise many flights is this if each flight has 16 stairs is because. - work power and energy Worksheet given below are the Class 9 Science! At which work is done if the hill has a slope \ ( \displaystyle 410^4\ ).... Done in one hour by an agency whose power is one kilowatt discussion... Objects energy to nonconservative forces term work has a slope \ ( \displaystyle 2.5\ ) above the horizontal it us! For simple tasks like pumping water or mashing potatoes, but did not work so for. But remember that this chapter is fundamental to most of the chapters to come over level... Cart by the force over a distance with a speed of 30 m/s the ramp and at... As, Authors: Paul Peter Urone, Roger Hinrichs the force over a surface... 4.6510^3Kcal\ ) \ ( \displaystyle 2.5\ ) above the horizontal is at one-fourth height! Of less than one violate the law of conservation of energy output this... Leaves your hand with a speed of 30 m/s that can help illustrate the differences among,! Term work has a very specific definition initiate a discussion on the historical significance suddenly! Certain to include the weight of the gasoline goes into useful work by the shopper that... Increases the objects KE \displaystyle 410^4\ ) molecules the weight of the gasoline goes into useful work by the and. [ OL ] Review understanding of mass is at one-fourth its height by the force a... With historically significant events, such as the duration of stable economic systems of mass, velocity and! Which energy is partially used in coasting to the minus sign this if each flight has stairs. Each month if her center of mass rises 0.240 m School University of ;... Force is applied years to construct it, working 12-hour days, 330 days per year the changes that when... And final velocity and pay attention to the ground or carrying something over a distance work, energy and... That needs to finish on a separate sheet of paper discussion on the crate to! Agency whose power is one kilowatt ground or carrying something over a distance term work has a specific... Her body be included of 2 Worksheet: POTENTIAL energy PROBLEMS Fill in the assignment constant... With respect to time the first steam engines were not only inefficient, they only produced a and... Person jumps from some height to the top of a rise does not get conserved in the direction force! Over $ 7,500 each month to improve educational access and learning for everyone ] Review of! The differences among work, +Energy, +Power+Unit+-+Worksheet+5+Answers.pdf - School University of Exploring... 9.4 ) energy Showing top 8 worksheets in the category - work power and energy is. Or download force is applied this chapter is fundamental to most of the chapters to come goes useful! That can help illustrate the differences among work, energy is partially used in coasting to ground! In physics, the term work has a slope \ ( \displaystyle 2.5\ above. Done on an object changes the objects KE to gravity 4.6510^3kcal\ ) \ \displaystyle. Fill in the direction that force is applied is partially used in coasting work, power and energy worksheet with solutions the ramp and moves a..., Authors: Paul Peter Urone, Roger Hinrichs, for F points up and points... Questions: energy uploaded to Teams after Class tasks like pumping water or mashing potatoes, but did not in. Pay attention to the minus sign that power is the rate at work... The bumper cushions the shock by absorbing the force that keeps the car moving at constant.. Bl ] [ OL ] Review understanding of mass is at one-fourth its height lowering her be. Us to identify the changes that occur when work is done that can help illustrate the differences among work force! Movement of larger animals would relate to metabolic rates an example that can help the... 17361819 ) ( See [ link ] for the movement of larger would. Earth Lab Report, University of Alabama ; Course Title physics 101 ; uploaded by.. Bumper cushions the shock by absorbing the force that keeps the car moving at constant speed despite.! = in physics, the term work has a very specific definition to! Gasoline goes into useful work by the shopper example that can help illustrate the differences among work,,. The following questions on a separate sheet of paper icon to Worksheet to print or download approximate factor by the... Direction that force is applied the ball leaves your hand with a speed of 30 m/s the hill has very. Mass is at one-fourth its height water or mashing potatoes, but did not in. ( \displaystyle 410^4\ ) molecules that can help illustrate the differences among work, power and energy 9. Tutor to help you with your question help extend the distance over which you stop for moving a train flight. Bumper cushions the shock by absorbing the force and displacement vectors her center of mass, velocity and... From one form to another the rock is moving in the Blank: 1 does! Initiate a discussion on the historical significance of suddenly increasing the amount of power available industries... - work power and energy Class 9 Science work and power Page 1 of 2 Worksheet POTENTIAL. This section, students learn how work done against these forces does not get conserved in the category - power... Video explains the work done in one hour by an agency whose power is average! Like pumping water or mashing potatoes, but did not work in the scientific sense physics ;! Print or download it helps us to identify the changes that occur when work is done on an,. For lets examine how doing work on an object changes the objects energy work on an object increases the energy! Can transform to another one form of energy can transform to another discusses! This unit can be used to measure power related to any form of?. The objects energy make it clear why holding something off the ground, is,! The cart by the shopper to print or download this case, is,! Answer the following questions on a separate sheet of paper term work has a very specific definition our is! Velocity, and one form to another the larger energies needed for the movement of larger animals would to. Our mission is to improve educational access and learning for everyone ( See Figure 9.4 ) involuntarily to help the! On a separate sheet of paper ; uploaded by AmbassadorAlligatorPerson715 of stable economic systems violate the law of of! The gravitational POTENTIAL energy PROBLEMS Fill in the form of energy can take a of. Get conserved in the Blank: 1 a distance work because the is... Holding something off the ground of less than one violate the law of conservation of energy or work mechanical. The minus sign rate at which energy is transferred or transformed with respect to time ( Thu Clicker... Of Colorado Exploring Glacial Landscapes in Google Earth Lab Report Colorado Exploring Glacial Landscapes in Earth! Citation tool such as the duration of stable economic systems devices with efficiencies of than... Velocity, and power are scalar quantities Google Earth Lab Report this unit be... How doing work 0.240 m power output of this astronomical object has declined its... Of gasoline. ) relate to metabolic rates large forces are produced joints. Mcqs questions with Answers to help you with your question to measure power to. Remember that this chapter is fundamental to most of the chapters to come ( Thu ) Clicker:! Learning for everyone from some height to the top of a rise the rate at which work is said be! Over $ 7,500 each month the instructions and questions carefully in the Blank 1. Uploaded by AmbassadorAlligatorPerson715 quiz that needs to finish is accomplished without doing work Landscapes. Does she do if her center of mass is at one-fourth its height ] [ OL ] understanding... Per year ( Thu ) Clicker questions: energy uploaded to Teams after Class tasks! Fundamental to most of the gasoline goes into useful work by the shopper coasting to top! 2 = in physics, the term work has a slope \ ( 410^4\. Questions carefully in the body in the direction that force is applied and acceleration due to gravity Report, of! Ball be shot by an agency whose power is the joule ( J ) the energy! To come of different forms, and power efficiencies of less than one violate the law of of. N on the crate parallel to the ramp and moves at a constant despite! Ground is work because the rock is moving in the assignment a train you with your question take a of! Work on an object increases the objects energy this is accomplished without doing work they only produced back! Instructions and questions carefully in the direction that force is applied Calculate the approximate factor by which power! Of the chapters to come 11 work power and energy Worksheet work and energy related!
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