AP EAMCET · PHYSICS · Work Power Energy
A ball of mass \(10 \mathrm{~g}\) is allowed to fall down from 10 \(\mathrm{m}\) height. After collision with the ground if \(50 \%\) of its energy is lost, then the height reached by the ball is
- A \(4 \mathrm{~m}\)
- B \(6 \mathrm{~m}\)
- C \(5 \mathrm{~m}\)
- D \(7 \mathrm{~m}\)
Answer & Solution
Correct Answer
(C) \(5 \mathrm{~m}\)
Step-by-step Solution
Detailed explanation
Mass of ball, \(\mathrm{m}=10 \mathrm{~g}=10 \times 10^{-3} \mathrm{~kg}\) Height, \(\mathrm{h}=10 \mathrm{~m}\) Apply the conservation of energy potential energy \(=\) kinetic energy \(\mathrm{K} . \mathrm{E}=\mathrm{mgh}=10 \mathrm{mg}...(i)\)…
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