For perfectly elastic bodies, the value of coefficient of restitution is
1
0.5 to 1
0 to 0.5
zero
A tennis ball is dropped onto a plane surface from height 1.0 meter. After rebound, the ball rises to 0.64 meter height. The coefficient of restitution is
0.64
0.8
0.97
0.51
A marble ball is rolled on smooth floor of a room and hits the wall after 1 second. Subsequent upon rebound, it takes twice the time to reach the initial position from where it was rolled. The coefficient of restitution between the wall and ball is
0.25
0.50
0.75
1.0
A ball impinges directly upon another similar ball at rest and itself comes to rest due to impact. During collision, half of the kinetic energy gets dissipated. The coefficient of restitution is
0.25
0.5
0.707
0.84
A sphere P impinges directly onto another identical sphere Q at rest. If the coefficient of restitution is 0.5, the ratio of velocities Vq/Vp after the impact would be
1 : 1
2 : 1
3 : 1
2 : 3
A particle of mass 0.1 kg is moving at 2m/s towards another particle of mass 0.2 kg at 4 m/s. Upon collision, it reverses its direction but continues moving with the same speed. The coefficient of restitution is about
0.28
0.35
0.66
0.81
A boy throws a ball horizontally with a velocity of 4 m/s at a height of 3.2 m above the ground. If the coefficient of restitution between the ball and the ground is 0.8, the velocity of ball at first rebound will be
(Take g = 10 m/s2 )
4 m/s
6.4 m/s
7.5 m/s
10.4 m/s
An isolated particle of mass M is moving in horizontal plane (x-y), along the x-axis, at a certain height above the ground. It suddenly explodes into two fragment of masses m/4 and 3m/4. An instant later, the smaller fragment is at y= + 15 cm. The larger fragment at this instant is at
Y=-5cm
Y=+20
Y=+5cm
Y=-20cm
Two blocks of masses 10 kg and 4 kg are connected by a spring of negligible mass placed on a frictionless horizontal surface. An impulse gives a velocity of 14 m/s to the heavier block in the direction of the lighter block. The velocity of the centre of mass is
30 m/s
20 m/s
10 m/s
5 m/s