COMPUTER FUNDAMENTALS

Detailed explanation-1: -Thus we can conclude that the state of rest and motion are relative to the observer. Note: The state of the body depends on the position, time and the position of the observer. Hence when we describe the nature of motion of any body, we must mention the position of the observer also.

Detailed explanation-2: -Rest and motion are relative terms as an object can be at rest with respect to some surrounding and can be in motion with respect to some other surrounding simultaneously. For example, while sitting in a moving bus we are in motion with respect to the surroundings outside the bus.

Detailed explanation-3: -Solution: Rest-a body is said to be at rest, if it does not change its position with respect to its surrounding with time. Motion-a body is said to be at motion, if it changes its position with time.

Detailed explanation-4: -Relative motion of a body A body is in a state of motion w.r.t. a moving body if its position changes with time as seen by the moving body, else it is at a state of rest w.r.t the moving body. This occurs if and only if the velocity of the two bodies are equal at all instances of time.