# Physical Science

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?

a). 250 J
b). 490 J
c). 2500 J

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1. Compute the kinetic energy of the ball, (1/2) M V^2. That will be the answer.

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posted by drwls
2. 25000

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posted by laura
3. 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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4. . 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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5. you do 600 J of work hoisting a 2 kg bale of hay, to what height did you lift it

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6. 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?

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7. 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)?

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8. 2500 J

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posted by MILTON
9. 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?

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10. 250

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