Question

Explain centripetal force. Don't dare to copy from Google.​

Answer 1

Answer:

Centripetal Force

When a body is moving uniformly along a circular path, the magnitude of its velocity remains constant, but it's direction on its own. So, a body moving along a circular path is under the influence of an external force acting perpendicular to the direction of velocity and always directed towards a fixed point. This force is called 'centripetal' force. It's value depends on the mass of the body, magnitude of its velocity and the radius of the circular path described.

Centripetal force =

$mv ^{2} \div r$

Here, m is the mass of a bidy, v is the magnitude of the velocity or speed of the body and r is the radius of the circular path. Example: One end of a string is tied to a stone and the other end of the string is tied to a finger and is whirled in a vertical plane.

Centripetal force is exerted by the finger in the stone, and appears as a tension in the string.