Question

Name the laws involved in the following situations :
(a) the sum of products of masses and velocities of two moving bodies before and after their collision remains the same.
(b) a body of mass 5 kg can be accelerated more easily by a force than another body of mass 50 kg under similar conditions
(c) when person A standing on roller skates pushes another person B (also standing on roller skates) and makes him move to the right side, then the person A himself gets moved to the left side by an equal distance.
(d) if there were no friction and no air resistance, then a moving bicycle would go on moving for ever.

Answer 1

(a) Law of conservation of momentum is involved.
(b) Newton’s second law of motion is involved.
(c) Newton’s third law of motion is involved.
(d) Newton’s first law of motion is involved.