A boy of mass `40 kg` stands on a rail road car of mass `60 kg`, moving with velocity `10 m//s`. Now , the boy begins to run with velocity `5 m//s` , with respect to the car , in the same direction , the velocity of the car will be

A man of mass m stands on a long flat car of mass M , moving with velocity V.If he now begins to run with velocity u, with respect to the car , in the same direction as V, the the velocity of the car will be

A man of mass m stands on a long flat car of mass M , moving with velocity V.If he now begins to run with velocity u, with respect to the car , in the same direction as V, the the velocity of the car will be

A girl of mass 50 kg stands on a railroad car of mass 75 kg moving with velocity 20 ms^(-1) . Now , the girl begins to run with a velocity of 10ms^(-1) with respect to the car in the same direction , as that of the car. The velocity of the car at this instant will be

A girl of mass 50 kg stands on a railroad car of mass 75 kg moving with velocity 20 ms^(-1) . Now , the girl begins to run with a velocity of 10ms^(-1) with respect to the car in the same direction , as that of the car. The velocity of the car at this instant will be

A car of mass 1000 kg runs with a velocity of 10 m/s. what is the momentum of this car?

A flat car of mass M with a child of mass m is moving with a velocity v_(1) . The child jumps in the direction of motion of car with a velocity u with respect to the car. Find the final velocities of the child and that of the car after jump.

a. A rail road car of mass M is moving without friction on a straight horizontal track with a velocity ct. A man of mass m lands on it normally from a helicopter. What will be the new velocity of the car? ltbgt b. If now the man begins to run on it with speed um with respect to car in a direction opposite to motion of the car, what will be the new velocity of the car?

a. A rail road car of mass M is moving without friction on a straight horizontal track with a velocity ct. A man of mass m lands on it normally from a helicopter. What will be the new velocity of the car? ltbgt b. If now the man begins to run on it with speed um with respect to car in a direction opposite to motion of the car, what will be the new velocity of the car?

Two bodies of masses 2 kg and 4 kg are moving with velocities 2 m/s and 10 m/s respectively along same direction. Then the velocity of their centre of mass will be

A boat of mass 40kg is at rest. A dog of mass 4kg moves in the boat with a velocity of 10m//s . What is the velocity of boat (nearly)?