Forces and Laws...

In above figure, two boys A and B are shown applying force on a block. If the block moves towards the right, which one of the following statements is correct?

A girl is pushing a box towards east direction. In which direction should her friend push the box so that it moves faster in the same direction?

 A $$500 \ gm$$ gun fires a $$2 \ gm$$ bullet with a muzzle velocity of $$1600 \ ms^{-1}$$. The velocity of the gun is:

A boy of mass 40 kg jumps off a boat with a velocity of $$3ms^{-1}$$ . With what momentum does the boat move ?

What is the magnitude of the pseudo force on a driver by the racing car he operates,  as it accelerates horizontally along a straight line from rest to $$60\ ms^{-1}$$ in $$ 8.0\ s$$?

When an athlete takes part in a long jump he runs for a while and then jumps. This is because:

Newton's second law of motion gives

Two persons are applying forces on two opposite sides of a moving cart. The cart still moves with the same speed in the same direction. What do you infer about the magnitudes and direction of the forces applied.

Water sprinkler used for grass lawns begins to rotate as soon as the water is supplied. It is based on which law?

A boat with a sail, has an electric fan inside. When the fan starts, the boat