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Q.

A body of mass 0.5kg falls from a height of 10m to a height of 6m above the ground. Find the loss in potential energy taking place in the body  (g=10m/s2).

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a

8J

b

4J

c

6J

d

20J

answer is A.

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Detailed Solution

Given
 m=0.5kg,h1=10m,h2=6m
Loss in potential energy  P.E=mg(h1−h2)
 Loss in  P.E=0.5(10)(10−6)=20J
 

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