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GREEN CIRCLEIf you need a review, you can watch the short videohereabout work.1.Define "Work" in your own words. Write a complete sentence.2.Why is lifting a box 1-meter off the ground an example of work?3.Why is speeding up an example of work?4.If you change an object's energy from 30 J to 75 J, how much work did you do on it?5.If a car's kinetic energy is 100J and then it's given 300J of work, what's the car's final kinetic energy? Why?Use these equations to solve the following questions.Kinetic Energy=12m v2andPotential Energy=mg h6.A 5kg weight is on the ground. You lift it if you give it 196 J of work.A.What's it's potential energy after you lift it?B.What's it's height after you lift it?7.A 15 kg grocery cart at rest is pushed with 500 J of work.A.What was the energy of the cart before it was pushed?B.What was the kinetic energy of the cart after it was pushed?C.Did that work become kinetic energy or potential energy?D.What was the velocity of the grocery cart after it was pushed?8.A 1.2-kg basketball is on the ground with 0J of energy. You pick it up and throw it so that it's 3 meters offthe ground and moving 1.6 m/s.A.What's it's potential energy after you throw it?
B.What's its kinetic energy after you throw it?C.How much work did you do on the ball?ANSWERS:

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Term
Winter
Professor
William Stratenburg
Tags
4 meters, 1 5 meters, 0j