Forces and Laws...

 A bullet is fired from a gun with a velocity 600 m/s. The recoil velocity of the gun is 3 m/s. What is the ratio of the mass of the gun and bullet ? 

 A bullet of mass 125 gm leaves a rifle with a velocity of $$500ms^{-1}$$. The rifle recoils with a velocity of $$5ms^{-1}$$. Find the mass of the rifle.

 The mass of a loaded truck $$10$$ tonnes is going at a speed of $$20 \ kmph$$. A box of mass $$2$$ tonnes slips from it and falls on the road. Find the final velocity of the truck (assume that the power of the engine is constant)?

A bullet of mass $$0.01$$ kg is fired from a gun of mass $$5$$ kg with velocity of $$250$$ m/s, calculate the speed with which the gun recoils.

Two bodies have masses in the ratio $$3 : 4$$. When a force is applied on the first body, it moves with an acceleration of $$6 \ m/s^2$$. How much acceleration will the same force produce in the second body?

Two identical bullets are fired one by a light rifle and another by a heavy rifle with the same force. Which rifle will hurt the shoulder more and why ?

A passenger in a moving train tosses a coin which falls behind him. It means that the motion of the train is

The inertia of an object tends to cause the object:

STATEMENT - 1 : Gas ejected from rocket will never exert thrust on the rocket if the ejected gas and the rocket move in the same direction.
STATEMENT - 2 : To exert thrust on rocket in its direction of motion, the ejected gas (w.r.t. rocket) must move opposite to the velocity of rocket (w.r.t. ground).

An apple falls from a tree because of gravitational attraction between the earth and apple. If $$F_{1}$$ is the magnitude of force exerted by the earth on the apple and $$F_{2}$$ is the magnitude of force exerted by apple on earth, then