JEE Exam » Difference Between » Uniform and Non-Uniform Motion

Uniform and Non-Uniform Motion

A motion in which the body constantly moves with uniform speed is known as uniform motion while when its moves with different speed then it is non-uniform motion.

Uniform Motion: A body is said to be in uniform motion when it moves with a constant or uniform speed at a certain distance in an equal time interval. For example; aeroplanes fly at a constant speed in the air. The velocity of uniform motion remains constant i.e. unchanged. 

Non-Uniform Motion: A body is said to be in non-uniform motion when it moves with a variable speed in equal time intervals at different distances. For example; a bike travels in traffic. The velocity of non-uniform motion changes with time.

Uniform and Non-uniform Motion: Differnece

Uniform motion

Non-Uniform Motion

1. A motion in which a body covers a similar (equal) distance in a similar (equal) time interval is referred to as uniform motion

1. A motion in which a body covers dissimilar (unequal) distance in an equal (similar) time interval is referred to as non-uniform motion.

2. The speed is constant

2. The speed is not constant i.e. variable

3. The velocity of the object does not change.

3. The velocity of an object changes i.e. variable.

4. The acceleration is constant.

4. The acceleration is variable.

5. It occurs when the velocity, speed, acceleration and direction (all of them) of the object do not change or are constant

5. It occurs either when a change in speed or direction or both take place

6. The speed of the object is equal to the average speed

6. The speed of the object is not equal i.e. different to the average speed

7. In uniform motion, the straight line is shown on the distance-time graph

7. In non-uniform motion, the curved line graph is shown on the distance-time graph

8. For example; a baby crawls on the floor at a constant speed

8. For example; a vehicle moves in traffic at a variable speed

9. The body in uniform motion moves in a straight line

9. The body in non-uniform motion moves in a curve or wavy line

10. The pictorial representation of uniform motion is shown below;

10. The pictorial representation of uniform motion is shown below;

Uniform Circular Motion and Non-Uniform Circular Motion

Uniform Circular Motion: When an object at constant speed moves in a circular motion then it is referred to as uniform circular motion. In this motion, the velocity and direction are not constant with a constant speed. For example; the blade of a mixer grinder moves in a uniform circular motion. The formula for the speed of uniform circular motion is;

Speed = (2πr)/t

where t represents the time in completing one circle in seconds and 2πr represents the circle’s circumference.

Non-Uniform Circular Motion: When an object at a variable speed moves in a circular motion then it is referred to as non-uniform circular motion. In this motion, the angular velocity as well as the speed of the object changes. For example; a giant wheel moves in a non-uniform circular motion.

Uniform and Non-Uniform Speed and Velocity

Uniform speed: When an object covers an equal (similar) distance in an equal (similar) time interval then it is referred to as uniform speed.

Uniform velocity: When an object covers equal (similar) displacement in equal (similar) intervals of time then it is called uniform velocity.

Non-uniform speed: When an object covers unequal or different distances in equal (similar) time intervals then it is referred to as non-uniform speed.

Non-uniform velocity (Variable velocity): When an object covers unequal or dissimilar displacement in equal (similar) intervals of time then it is referred to as non-uniform velocity.

Conclusion

Uniform motion is the rectilinear motion of a body when it covers a similar distance in similar time intervals while non-uniform motion is the rectilinear motion of a body when it covers unequal or variable distance in similar time intervals. The acceleration of uniform motion is zero while that of non-uniform motion is not zero. Uniform circular motion is a type of uniform motion in a circular direction and the non-uniform circular motion is a type of non-uniform motion in a circular direction in equal time intervals.

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What is the difference between Uniform and Non-Uniform Motion?

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Explain uniform circular motion with example.

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