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PhysicsW.E.P.MiscellaneousEasy2 minPYQ_2020

PhysicsEasysingle choice

A $1.0 k g$ ball drops vertically into a floor from a height of $25 c m$ . It rebounds to a height of $4 c m$ . The coefficient of restitution for the collision is

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Answer:

Solution:

Initial velocity before colliding floor $u = \sqrt{2 g h}$
$u = \sqrt{5}$
final velocity after colliding floor $v = \sqrt{2 g h'}$
$v= \sqrt{0.8}$
We know that coefficient of restitution $e = \frac{v}{u}$
$e = \frac{\sqrt{0.8}}{\sqrt{5}} = 0.4$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:W.E.P.Subtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2020

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