Work Energy And Power Question 131

Question: An inelastic ball is dropped from a height of 100 m. Due to earth, 20% of its energy is lost. To what height the ball will rise [RPMT 1996]

Options:

A) 80 m

B) 40 m

C) 60 m

D) 20 m

Show Answer

Answer:

Correct Answer: A

Solution:

$ mgh=\frac{80}{100}\times mg\times 100 $
therefore $ h=80m $



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