[" If a skater of weight "3kg" has initial speed "32m/s" and second "],[" one of weight "4kg" has "5m/s" .After collision they have speed "],[" (couple) "5m/s" .Then the loss in K.E.is "]

If a skater of weight 3 kg has initial speed 32 m / s and second one of weight 4 kg has 5 m / s . After collision, they have speed (couple) 5 m / s . Then the loss in K.E. is

Two balls A and B having masses 1 kg and 2 kg, moving with speeds 21 m/s and 4 m/s respectively in opposite direction, collide head on. After collision A moves with a speed of 1 m/s in the same direction, then the coefficient of restitution is

A lift is moving upwards with a constant speed of 5(m)/(s) . The speed of one of the pulleys is 5(m)/(s) as shown. Then the speed of second pulley is:

A lift is moving upwards with a constant speed of 5(m)/(s) . The speed of one of the pulleys is 5(m)/(s) as shown. Then the speed of second pulley is:

A highly elastic ball moving at a speed of 3 m//s approaches a wall moving towards it with a speed of 3 m//s . After the collision. the speed of the ball will be

A highly elastic ball moving at a speed of 3 m//s approaches a wall moving towards it with a speed of 3 m//s . After the collision. the speed of the ball will be

Two ball A and B having masses 1kg and 2kg, moving with speeds 21m//s amd 4m//s repectively in opposite direction, collide head on. After collision A moves with a speed of 1m//s in the same direction, then correct statements is:

A ball A of mass 1 kg , moving with a speed of 12 m//s , collides obliquely and elasticity with another ball B which was initially at rest. Ball A then moves off at the right angle to its initial direction with a speed of 5 m//s . The momentum of ball B after the collision is

A 60 kg body moving with speed 12 m/s collides inelastically with another body of mass 50 kg moving in same direction with speed 2 m/s. After collision the 50 kg body moves with a speed of 10 m/s. The value of coefficient of restitution (e) is :-