Given below are a few situations, study them and state in which of the given case work is said to be done. Give reason for your answer.

A person pushing hard a huge rock but the rock dones not move.

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A bullock pulling a cart upto 1 km on road.

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A person standing with a heavy bag on his head.

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A person standing simply

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Solution

The correct option is B A bullock pulling a cart upto 1 km on road.
$W o r k d o n e = f o r c e \times d i s p l a c e m e n t$
Work is said to be done only when force applied causes a displacement in or opposite to the direction of force applied.

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Similar questions

In which of the following cases is work being done :

(a) A boy pushing a heavy rock

(b) A boy climbing up the stairs

(d) A girl moving on the road.

A

B

A

22.0 N

B

33.0 N

2.0 m

B

A bullock is pulling a cart. The cart moves. There is a force on the cart and the cart has moved. Do you think that work is done in this situation?

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