Question

A ball is thrown towards a moving train of velocity 72km/h
from behind.
If the coefficient of restitution is
'e' = 1/3, the speed with which the ball is thrown
so that the ball comes to rest after the collision will
be
(1) 80 m/s
(3) 60 m/s
(2) 20 m/s
(4) 100 m/s​

Answer 1

Answer:

A ball is thrown towards a moving train of velocity 72km/h(1) 80 m/s

(3) 60 m/s

(2) 20 m/s

(4) 100 m/s

Explanation:

(1) 80 m/s

(3) 60 m/s

(2) 20 m/s

(4) 100 m/sA ball is thrown towards a moving train of velocity 72km/h

Answer 2

Answer:

80m/s

1. Explanation:-Initial and final velocity of train is same as mass of ball is negligible