Question

what is centripetal force and examples

Answer 1

Whenever an object moves in a circle, it has a centripetal force. But what exactly is that? A centripetal force is a force pointed towards the center of a circle that keeps an object moving in that circle. Without it, an object would fly out of the circle, continuing in a straight line.

We know this because of Newton's 1st Lawwhich says that an object in motion stays in motion, and an object at rest stays at rest, unless acted upon by an unbalanced force. Let's say you rolled a ball along the floor. The force of gravity pulls the ball toward the ground, but the normal force counteracts gravity and points away from the ground. The two forces are balanced. In the absence of any other forces, objects continue in a straight line at a constant velocity.

Examples of Centripetal Force

1.If you whirl a ball on a string above your head, the centripetal force is the force of tension.
2. If you're in a spacecraft orbiting the Earth, the centripetal force is the force of gravity.
3. If you drive a car in a circle, the centripetal force is the force of friction between the road and the tires.

Answer 2

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☛When a body moves along a circular path in a uniform speed, its direction of motion changes at every points.

☛The change in direction involves changes in velocity or acceleration.

☛The force that provide the acceleration and keeps the body moving along a circular path acts towards centre. This force is known as centripetal ( centre seeking) force.

☛This is a force required to make a body move along a circular path with uniform speed.

☛It always acts along the radius and towards the centre of the circular path.

☛Eg:- The motion of the Moon around the earth is due to the centripetal force. The centripetal force is provided by the force of attraction of the earth. If there was no such force, the moon would move in straight line motion.