motion

1. acceleration

1.1. increase in the rate or speed of something.

1.2. The term sliding friction refers to the resistance created by two objects sliding against each other. This can also be called kinetic friction. Sliding friction is intended to stop an object from moving.

1.3. .

2. friction

2.1. the resistance that one surface or object encounters when moving over another.

2.2. When an object is speeding up, the acceleration is in the same direction as the velocity. Thus, this object has a positive acceleration. In Example B, the object is moving in the negative direction (i.e., has a negative velocity) and is slowing down.

2.3. .

3. fore

3.1. situated or placed in front.

3.2. how hard you hit something

3.3. .

4. speed

4.1. the rate at which someone or something is able to move or operate.

4.2. .

4.2.1. the indefinite continued progress of existence and events in the past, present, and future regarded as a whole.

4.3. .

5. distance

5.1. an amount of space between two things or people.

5.2. Distance is a scalar quantity representing the interval between two points. It is just the magnitude of the interval. However, Displacement is a vector quantity and can be defined by using distance concept. It can be defined as distance between the initial point and final point of an object. It must be the shortest interval connecting the initial and final points, that is a straight line.Let's look at the below examples for deep understanding.

5.3. .

6. time

6.1. the indefinite continued progress of existence and events in the past, present, and future regarded as a whole.

6.2. clock

6.3. .

7. velocity

7.1. show how fast

7.2. .

7.3. velocity

8. gravity

8.1. the force that attracts a body toward the center of the earth, or toward any other physical body having mass. For most purposes Newton's laws of gravity apply, with minor modifications to take the general theory of relativity into account.

8.2. space

8.3. gravity