Force Test - 3...

A particle is in straight line motion with uniform velocity. A force is not required

A boy sitting on the top most berth in the compartment of a train, which is just going to stop on a railway station, drops an apple aiming at the open hand of his brother sitting vertically below him at a distance of about 2m. The apple will fall

Gravel is dropped into a conveyer belt at a rate of 0.5 kg/s. The extra force required in Newton to keep the belt moving at 2 m/s is

Two balls, each of mass 0.25 kg, are moving with 3m/s and 1m/s towards each other in a straight line collide. The balls stick together after the collision. The magnitude of the final velocity of the combined mass is

A body of mass m moving with a constant velocity v hits another body of the same mass moving with same velocity v but in the opposite direction and sticks to it. The velocity of the compound body, after collision, is