Work Energy And Power Question 238

Question: A ball dropped from a height of 2m reaches to a height of 1.5m before hitting the ground. Then the percentage of potential energy lost is

Options:

A) 25

B) 30

C) 50

D) 100

Show Answer

Answer:

Correct Answer: A

Solution:

[a] U1=mgh1andU2=mgh2

=mgh1mgh2mgh1×100=(h1h2h1)×100

=21.52×100=25



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