A machine gun fires a bullet of mass 40 g with a velocity 1200 m/s.The man holding it can exert a maximum force of 144 N on the gun.How many bullets can he fire per second at the most ?

A drum of radius R and mass M ,rolls down without slipping along an inclined plane of angle θ.The frictional force

The upper half of an inclined plane of inclination θ is perfectly smooth while the lower is rough.A body starting from rest at the top comes back to rest at the bottom,if the coeffecient of friction for the lower half is given by

A force of 100 N need to be applied parallel to a smooth inclined plane just to hold a body on it. The angle of inclination of the inclined plane is 300. How much horizontal force need to be applied to do the same?

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

Two blocks P and Q are released at the top of a rough inclined plane so that P slides along the plane and Q falls down freely. Which will have higher velocity on reaching the ground?

A gun of mass 1kg fires a bullet of mass 1g with a velocity of 1ms^-1.The recoil velocity of the gun is

Physical independence of force is a consequence of 

A block is lying static on the floor.The maximum value of static frictional force on the block is 10 N.If a horizontal force of 8 N is applied to the block,what will be the frictional force on the block ?

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