Name the laws involved in the following situations:
(a) The sum of products of masses and velocities of two moving bodies before abd 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 forever.
(a) The name of the corresponding law is law of conservation of momentum. It can be derived from Newton's laws of motion.
(b) The name of corresponding law is Newton's second law of motion which proves that the acceleration of the body is inversely proportional to its mass.
(c) In this Newton's third law of motion is involved which says that every action has a equal and opposite reaction.
(d) This involves Newton's first law of motion or the law of inertia which states that n object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.