In a particular crash test, a car of mass 1500 kg collies with a wall as shown in fig. The initial and final velocities on the car are →vi=-15.0ˆims-1 and →vf=5.00ˆims-1, respectively. If the collision lasts 0.150s, find the impulse caused by the collision and the average force exerted on the car.

A body of mass 2 kg collides with a body of mass 1 kg. Their initial velocities are 6 m/s and 4 m/s respectively. If the velocity of the first body after collision is : (14)/3 m/s , find the velocity of the second body after collision.

Choose the correct options A ball of mass 250 g moving with 20 m//s strikes a vertical wall and rebounds along the same line with a velocity of 15 m//s . If the time of contact is 0.1 s, the force exerted by the wall on the ball is

A body of mass 1 kg moving with velocity 5 m/s collides with another body of mass 2 kg moving with velocity 1.5 m/s in opposite direction. If the coefficient of restitution is 0.8, their velocities aftter collision respectively are

A bullet of mass 0.1 kg moving horizontally with a velocity of 20 m//s strike a stationary target and is brought to rest in 0.1 s. Find the impulse and average force of impact.

Two bodies of masses m and 2m, moving with initial velocities 50 m//s in the + x direction and 40 m//s in the -x direction respectively, undergo a head -on elastic collision. (i) Calculate their final velocities (ii) What is the ratio of the final to initial kinetic energies for the body of mass m? (iii) Calculate the change in momentum of each body if m= 1kg (iv) What is the change in the momentum of the system?

Solve the following examples: (numerical problems) A body of mass 1 kg, moving with a velocity of 4 m/s collides with a body of mass 0.5 kg moving with a velocity of 2 m/s . If the velocity of the first body after collision is 8/3 m/s , find the velocity of the second body after collision.

A cricket ball of mass 0.5 kg strikes a circket bat normally with a velocity of 20" m s"^(-1) and rebounds with a velocity of 10" m s"^(-1) . The impulse of the force exerted by the ball on the bat is

A body of mass 0.1 kg travelling with a velocity of 5 m/s, collides head-on with another body of mass 0.2 kg travelling in the same direction with a velocity of 1.2 m/s. If the two bodies stick together after collision, their common velocity is

A body of mass 2 kg travels with a velocity of 8 m//s makes a head on collision with another body having mass 4 kg, which is travelling in the same direction with a velocity of 1 m//s . Calculate the velocities of the two bodies after collision. Find the loss in kinetic energy of the system. (Given e = 0.5)