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In loading a truck, a man lifts boxes of...

In loading a truck, a man lifts boxes of 100 N each through a height of 1.5 m.
(a) How much work does he do in lifting one box ?
(b) How much energy is transferred when one box is lifted ?
(c) If the man lifts 4 boxes per minute, at what power is he working ?
(`g = 10 m s^(-2`)

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The correct Answer is:
(a) 150 J (b) 150 J (c) 10 W
NA
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LAKHMIR SINGH & MANJIT KAUR-WORK AND ENERGY-Exercise
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  8. Define 1 J of work.

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  10. What is the kinetic energy of an object ?

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  11. Write an expression for kinetic energy of an object.

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  12. The kinetic energy of an object of mass m moving with a velocity of 5 ...

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