AP EAMCET · PHYSICS · Work Power Energy
A ball at rest is dropped from a height of 12 . It losses \(25 \%\) of its kinetic energy on striking the ground and bounces back to a height ' \(h\) '. Then value of ' \(h\) ' is
- A \(3 \mathrm{~m}\)
- B \(6 \mathrm{~m}\)
- C \(9 \mathrm{~m}\)
- D \(12 \mathrm{~m}\)
Answer & Solution
Correct Answer
(C) \(9 \mathrm{~m}\)
Step-by-step Solution
Detailed explanation
Energy of balls at rest, \(K_1=m g h_1\) and \(K_2=m g h_2\) percentage loss in \(\mathrm{KE}=\frac{K_1-K_2}{K_1} \times 100\)…
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