Priyanka B Solutions for Chapter: Forces and Laws of Motion, Exercise 4: Assignment

An object is thrown vertically upwards. What is its momentum at the highest point?

What is the relation between force and acceleration?

Name the principle on which a rocket works.

Why do not the forces of action and reaction cancel each other?

When two bodies $X$ and $Y$ collide with each other, $X$ exerts a force of $5 \mathrm{N}$ on $Y$ towards east direction. What is the force exerted by $Y$ on $X$? Justify your answer stating the law. 

When a person jumps out of a boat, the boat moves backward. Explain why?

When a bullet is fired, it exerts an equal and opposite force on the gun. Yet hurt caused by the recoil of gun is much less than that by bullet. Give reason.
 

State Law of conservation of momentum.