Question

Define the state of rest and the state of motion of an object.

Answer 1

Hint: If the position of an object does not change with time, the object is said to be in rest. And, if the position of an object changes with time, it is said to be in motion. Both the state either est or motion is judged based on another object or another frame of reference.

Complete step by step answer:
State of rest: Rest is the state of an object being stationary relative to a particular frame of reference or another object. When the position of a body concerning its surroundings does not change with time, it is said to be “at rest”. For example, a house, a tree is at rest for the things on earth as they are not moving. But as the earth is moving, all the things are moving. So, there is the absolute state of rest.

State of motion: The state of motion of an object is defined by the speed with direction relative to a particular frame of reference or another object. When the position of a body concerning its surroundings changes with time, it is said to be the object is in motion. For example, a car is moving, a man is walking, etc.

Note:
There is no existence of absolute rest or absolute motion. the state of rest and the state of motion of an object are judged by a particular frame of reference. For example, when we stay inside a moving train and look at another moving train, it seems to rest to us. So, we see things's motion concerning our frame. In another example, when we stay inside a moving train or car, objects like trees, houses, etc seem in motion. But for the person on the outer side of the car, they seem in rest.