A heavy uniform chain lies on horizontal table top.If the coeffecient of friction between the chain and the table surface is 0.25,then the maximum friction of the length of the chain that can hang over one edge of the table is

A 10 kg stone is suspended with a rope of breaking stength 30 kg wt.The minimum time in which the stone can be raised through a height 10 m starting from rest is (taking g = 10 N/kg):

If the force on a rocket moving with a velocity of 300 m/s is 345 N, then the rate of combustion of the fuel ,is 

A block of 10 kg is pulled at a constant speed on a rough horizontal surface by a force of 20 N.Find the co- effecient of kinetic friction .Given that g = 10 m/s² .

A 5000 kg rocket is set for vertical firing.The exhaust speed is 800 m/s and acceleration(a) of the rocket is 20 m/s².The acceleration due to gravity is 10 m/s².The amount of gas ejected per second is

A body is placed on an inclined plane and has to be pushed down.The angle made by the normal reaction with the vertical will be

A certain force applied to a mass m₁ gives it an acceleration of 15 m/s² .The same force applied to a mass m₂ gives it an acceleration of 10 m/sec² .If the two masses are fixed together and the same force is applied to the combination ,find the acceleration.

A 600 kg rocket is set for a vertical firing.If the exhaust speed is 1000 m/s,the mass of the gas ejected per second to supply the thrust needed to overcome the weight of rocket is

Friction is the result of

A body of mass 2 kg ,moving on a horizontal surface with an initial velocity of 4 m/s , comes to rest after 2 s.If one wants to keep this moving on the same surface with a velocity of 4 m/s,the force required is