UPSC CDS Science Physics Questions Part 1

Newton's laws of motion do not hold good for objects moving with velocity comparable to velocity of light. Newton's laws of motion are for matters which occupy some space and have some mass. As the speed of an object approaches the speed of light, the mass tends to increase and at the speed of light, it becomes infinite. So, simple laws of motion provided by Newton will not hold perfect to an object moving at a higher speed near to the speed of light