Question

Give two examples of bodies in non-uniform motion.

Answer 1

Hint: A body can have either uniform motion or non-uniform motion. In uniform motion there are equal displacements in equal intervals of time. In non-uniform motion, the displacements are unequal for equal intervals of time.

Complete answer:
A body is said to be in a non-uniform motion if the body is not moving along a straight line such that there are unequal displacements of the body in equal intervals of time. The velocity of the body does not remain constant during the non-uniform motion as there is some finite acceleration taking place in the motion of the body.

Examples of non-uniform motion:

1. A vehicle moving on a bumpy road experiences irregular changes in velocity and acceleration.
2. A speeding vehicle actually undergoes acceleration and an accelerated motion is known as non-uniform motion.
3. The motion of a projectile: As a body falls under the influence of gravity, it undergoes acceleration which is equal to the acceleration due to gravity and acceleration means that the body is undergoing non-uniform motion.

Additional Information:
There are two types of motions that a body can have. It can either be in uniform motion or non-uniform motion.

A body is said to be in a uniform motion if the body is moving along a straight line such that there are equal displacements of the body in equal intervals of time. The velocity of the body remains constant during the uniform motion.

Examples of uniform motion: Movement of hands of a watch, blades of a fan, etc.

Note:
The uniform motion is considered as an ideal motion since practically it is difficult to maintain a constant velocity due to various factors like friction, air drag, etc. The non-uniform motion can be observed everywhere around us. Wherever there is acceleration taking place in the motion of a body, the motion is said to be non-uniform motion.