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Q.

A porter holds a load of 500 N for 10 seconds. The work done by him is_


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a

50 J

b

5000 J

c

500 J

d

0 J 

answer is D.

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Detailed Solution

The work done by him is 0 J.
Given,
Weight of the load, F=500 N
Time, t=10 s
We know that work done by the porter is given by
W=× d
W=0
is the distance covered in the direction of the force.
Here, a porter holds a load. So, the distance travelled by the porter is 0. Hence, the work done by him is 0.
 
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