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The decrease in the potential energy of ...

The decrease in the potential energy of a ball of mass 20 kg which falls from a height of 50 cm is

A

1980 J

B

98J

C

49J

D

968J

Text Solution

Verified by Experts

The correct Answer is:
B
The relation between kinetic energy (K) and momentum
(P) is given K`=(p^2)/(2m)`
`:." "(/_\K)/K=2(/_\P)/(P)=2(0.0.1%)=0.02%`
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