define motion

In physics, the motion is the change in position of an object with respect to its surroundings in a given interval of time. 

Motion of an object depends on the type of force acting on the body. Examples of different kinds of motion are given below.

• Translational – It is the type, where an object moves along a path in any of the three dimensions.
• Rotational – It is the type, where an object moves along a circular path about a fixed axis.
• Linear – It is a type of translational motion where the body moves in a single direction along a single dimension.
• Periodic – It is the type of motion that repeats itself after certain intervals of time
• Simple Harmonic – It is the type of motion like that of a simple pendulum where a restoring force acts in the direction opposite to the direction of motion of the object. This restoring force is proportional to the displacement of the object from mean position.
• Projectile – It is the type of motion which has a horizontal displacement as well as vertical displacement.
• Oscillatory – It is the type of motion which is repetitive in nature within a time frame. If it is mechanical in nature it is called vibration.