Work and Energy Practice Problems

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Presentation transcript:

Work and Energy Practice Problems

Question #1 A person lifts an object to a height of 8 m with a force of 30 N. How much work was done on the object?

Question #2 If a 4 kg object is held above the ground at a height of 1 meter, how much energy does it have? What kind of energy is this?

Question #3 In the previous question, how much work was done when lifting an object to that height?

Question #4 If the same object was then dropped, how much energy would it have just as it struck the ground below? What kind of energy is this?

Question #5 How much work would the ground do back on the object to stop it? (Same object from #2- #4)

Question #6 A 1 kg object is projected straight upward into the air with a speed of 8 m/s. How high will it rise?

Question #7 A 10 kg object is released from 16 m above the ground. How fast will it be going after it has fallen halfway?

Question #8 In the picture below, at which letter does the ball have the highest PE?

Question #9 In the picture below, at which letter does the ball have the highest KE?

Question #10 In the picture below, at which letter(s) does the ball have increasing PE and decreasing KE?

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