Question

When a body moves uniformly along the circle, then:

• A. Its velocity changes but its speed remain the same
• B. Its speed changes but its velocity remain the same
• C. Both speed and velocity changes
• D. Both speed and velocity remain same

Answer 1

The correct option is A

Its velocity changes but its speed remain the same

The explanation of the correct option:

In case of option (A)

Uniform Circular Motion

1. A uniform circular motion would be the change in position in a circular route around the perimeter of a circle.
2. With steady speed, it can be uniform.

Speed

1. The rate at which an object moves a specific distance is known as speed. It's a number with a scalar value.
2. The average speed will be used regardless of the distance traveled.

Velocity

1. The rate at which an object moves its location in a given direction is generally referred to as velocity.
2. It's a quantity with a vector.
3. Because an object's velocity changes with its direction, if it moves in the same direction, its velocity will remain constant.
4. When a body moves in a circle uniformly, it covers the same amount of ground at the same time.

As a result, the speed remains constant. However, because it is rotating in a circle, the direction of motion is always changing.

While the velocity fluctuates, the speed remains constant. As a result, the velocity changes but the speed remains constant.

Hence, the correct option is A.