First slide

Collisions

Question

An inelastic ball is dropped from a height of 100 m. Due to earth, 20% of its energy is lost. To what height the ball will rise

Moderate

A

80 m
B

40 m
C

60 m
D

20 m

Solution

$mgh = \frac{80}{100} \times mg \times 100 \Rightarrow h = 80 m$

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