How much energy is gained by a box of mass $20 k g$ when a man carrying the box waits for $5$ minutes for a bus? $(g = 10 m s^{- 2})$

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Solution

When a man holds a box for a certain mount of time, no energy is being transferred to it, as the gain/loss in kinetic energy or potential energy by the box is zero. Here the box does not have any displacement, so no work is done on it.

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Similar questions

How much energy is gained by a box of mass 20 kg when a man

(a) carrying the box waits for 5 minutes for a bus?

(b) runs carrying the box with a speed of 3 m $s^{- 1}$ to catch the bus?

How much energy is gained by a box of mass $20 k g$ when a man.

(i) Carrying the box waits for $5 \min$ for a bus?

20 k g

0.5 m

(g = 10 m s^{- 2})

How much energy is gained by a box of mass $20 k g$ when a man.

(ii) runs carrying the box with a speed of $3 m s^{- 1}$ to catch the bus?

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