Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Work Power Energy

Question:

A ball is dropped from a height of 1 m. If the coefficient of restitution between the surface and ball is 0.6, the ball rebounds to a height of : 

Options:

1 m

0.6 m

0.4 m

0.36 m

Correct Answer:

0.36 m

Explanation:

Given : \(h_1 = 1 \text{ m } \)

Coefficient of restitution : \(e = \frac{v_2}{v_1} = 0.6\)

As : \(\frac{h_2}{h_1} = [\frac{v_2}{v_1}]^2\)

  = \(0.6^2 = 0.36\)

\(h_2 = 0.36 h_1 = 0.36 \text{ m}\)