A ball of mass 0.1 kg, initially at rest, dropped from height

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A ball of mass 0.1 kg, initially at rest, dropped from height of 1 m. Ball hits the ground and bounces off the ground. Upon impact with the ground, the velocity reduces by 20%. The height (in m) to which the ball will rise is _______.

1. 0.66 m
2. 0.04 m
3. 0.64 m
4. 1.64 m

Correct Option: C

v = √2gh = √2 × 9.01 × 1 ⇒ 4.4294 m/s
v' = 0 × v = 3.5432 m/s

h =	v²	= 0.64 m
	2g