A loaded `20,000kg` coal wagon is moving on a level track at `6ms^-1`. Suddenly `5000kg` of coal is dropped out of the wagon. The final speed of the wagon is

A wagon of 200 kg is moving on a smooth track with velocity of 2 m//sec . A man of 80 kg also runs in the wagon with a velocity such that speed of the centre of mass of the system is zero. Find the velocity of man relative to the wagon (in m//s).

Find velocity of wagon as function of time when it is being filled with stationary hopper at the rate mu kg/sec. and constant force F is applied horizontally on the wagon as shown in figure. M_(0) is the mass of the wagon and initial speed of the wagon u = 0 at time t = 0.

A wagon is moving along a straight railway track with a velocity of 3.2 m cdot s^(-1) . The wagon is being loaded with coal in moving condition at a rate of 540 kg. min^(-1) . How much force is to be applied to move the wagon at a constant velocity?Assume, the initial velocity of the coal at horizontal direction is zero.

A body of mass 4kg moving with a speed of 3 ms^(-1) collides head on with a body of mass 3 kg moving in the opposite direction at a speed of 2 ms^(-1) . The first body stops after the collision. The final velocity of the second body is

An open water tight railway wagon of mass 5 xx 10^(3) kg moves at an initial velocity 1.2 m//s without friction on a railway track. Rain drops fall vertically downwards into the wagon. The velocity of the wagon after it has collected 10^(3) kg of water will be :-

An open water tight railway wagon of mass 5 xx 10(3) kg coats at an initial velocity 1.2 m//s without friction on a railway track. Rain drops fall vertically downwards into the wagon. The velocity of the wagon after it has collected 10^(3) kg of water will be :-

An open water tight railway wagon of mass 5 xx 10(3) kg coats at an initial velocity 1.2 m//s without friction on a railway track. Rain drops fall vertically downwards into the wagon. The velocity of the wagon after it has collected 10^(3) kg of water will 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 it moves now is