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Question

# When a body moves uniformly along the circle, then:

A

Its velocity changes but its speed remain the same

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B

Its speed changes but its velocity remain the same

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C

Both speed and velocity changes

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D

Both speed and velocity remain same

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Solution

## 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 MotionA uniform circular motion would be the change in position in a circular route around the perimeter of a circle. With steady speed, it can be uniform.SpeedThe rate at which an object moves a specific distance is known as speed. It's a number with a scalar value. The average speed will be used regardless of the distance traveled.VelocityThe rate at which an object moves its location in a given direction is generally referred to as velocity. It's a quantity with a vector. Because an object's velocity changes with its direction, if it moves in the same direction, its velocity will remain constant.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.

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