Answer:

1. Motion- the change of position of an object with respect to time.

2. Distance- is a scalar quantity that refers to "how much ground an object has covered" during its motion.

3.Displacement- is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position.

4.Speed- is a scalar quantity that refers to "how fast an object is moving".

5.Velocity- is a vector quantity that refers to "the rate at which an object changes its position.

6. means the rate at which an object speeds up

7. means the rate at which an object slows down.

8. Vector quantities refer to the physical quantities characterized by the presence of both magnitude as well as direction.

9. Scalar quantity is defined as the physical quantity with magnitude and no direction.

10. When the speed of an object remains the same , it does not increase or decrease - we say it is moving at a constant speed.

11. Constant velocity means that the object in motion is moving in a straight line at a constant speed.

12. The average speed of a body in a certain time interval is the distance covered by the body in that time interval divided by time.

Explanation:

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