EVERYDAY SCIENCE

Detailed explanation-1: -Motion is a change in position measured by distance and time. Speed tells us the rate at which an object moves. Velocity tells us the speed and direction of a moving object. Acceleration tells us the rate at which velocity changes.

Detailed explanation-2: -Motion is defined as a change in position of an object with respect to time, thus option B is correct.

Detailed explanation-3: -Motion is a change of position of an object. There are many kinds of motion. You can walk forward or backward. An elevator goes up and down.

Detailed explanation-4: -What does displacement mean? If an object moves relative to a reference frame-for example, if a professor moves to the right relative to a whiteboard, or a passenger moves toward the rear of an airplane-then the object’s position changes. This change in position is known as displacement.

Detailed explanation-5: -Motion – an objects change in position over time when compared to a reference point.