A bomb of mass 10 kg at rest explodes into two parts of 3 kg and 7 kg.If smaller part moves with a speed `14 m s^(-1)` towards east ,find the velocity of the heavier part.

What is de-Broglie waveelngth of a 3 kg object moveing with a speed of 2 m s^(-1) ?

A bullet of mass 20 g is fired with speed 400 m s^-1 by a gun of mass 8 kg. Find the recoil velocity of the gun.

A bomb of mass 9 kg explodes into pieces of masses 3 kg and 6 kg. The velocity of 3 kg mass is 16 m/s. Find the kinetic energy associated with the 6 kg mass.

A bolt of mass 0.3 kg falls from the ceiling of an elevator moving down with an uniform speed of 7 m s^-1 . It hits the floor of the elevator (length of the elevator = 3 m) and does not rebound. What is the heat produced by the impact ? Would your answer be different if the elevator were stationary ?

A body of mass 10 kg at rest was moved by a constant force 50 N. Find the K.E. of the body at the end of 5 seconds.

A man of mass 70 kg stands on a weighing scale in a lift which is moving :- upwards with a uniform speed of 10 m s^-1 , what would be the reading on scale?

A 5 kg ball is trhown up with a speed of 10 m/s. Find its potential energy when it reaches the highest point.

A 5 kg ball is trhown up with a speed of 10 m/s. Find its kinetic energy at the time of throw.

Two bodies of different masses of 2 kg and 4 kg are moving with velocities 2 ms^-1 and 10 ms^-1 towards each other due to mutual gravitational attraction. What is velocity of their centre of mass?