Work Energy And Power Question 129

Question: A tennis ball dropped from a height of 2 m rebounds only 1.5 m after hitting the ground. What fraction of its energy is lost in the impact

Options:

A) 14

B) 12

C) 13

D) 18

Show Answer

Answer:

Correct Answer: A

Solution:

Fractional loss =ΔUU=mg(hh)mgh

=21.52=14



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