Laws of Motion ...

A bird weighs 2 kg and is inside a closed cage of 1 kg. If it starts flying, then what is the weight of the bird and cage assembly

A man is standing on a balance and his weight is measured. If he takes a step in the left side, then weight

A man is standing at a spring platform. Reading of spring balance is 60 kg wt. If man jumps outside platform, then reading of spring balance

A cold soft drink is kept on the balance. When the cap is open, then the weight

A bird is sitting in a large closed cage which is placed on a spring balance. It records a weight of 25 N. The bird (mass m = 0.5 kg) flies upward in the cage with an acceleration of 2 m/s². The spring balance will now record a weight of

A book is lying on the table. What is the angle between the action of the book on the table and the reaction of the table on the book

In an air collision between an aeroplane and a bird, the force experienced by the bird as compared to that of the aeroplane is

An explosion blows a rock into three parts. Two parts go off at right angles to each other. These two are, 1 kg first part moving with a velocity of 12 ms^–1 and 2 kgsecond part moving with a velocity of 8 ms^–1. If the third part flies off with a velocity of 4 ms^–1, its mass would be

A wagon weighing 1000 kg is moving with a velocity 50 km/h on smooth horizontal rails. A mass of 250 kg is dropped into it. The velocity with which if moves now is

If a force of 250 N act on body, the momentum acquired is 125 kg-m/s. What is the period for which force acts on the body