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How long would it take a 20.0 hp motor to lift a 1,000.0 kg crate from the bottom of a freighter's hold to the deck (40.0 m)?
A 250.0 kg roller coaster car has 20,000.0 J of potential energy at the top of the hill. Neglecting frictional losses, what is the velocity of the car at the bottom of the hill?
you do 600 J of work hoisting a 2 kg bale of hay, to what height did you lift it
. you roll a 5.0 kg bowling ball down the alley at 10.0 m/s, how much work did you do on the ball?
If you roll a 5.0 kg bowling ball down the alley at 10.0 m/s, how much work did you do on the ball?

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