Q&A on Circular Motion

This is a Slow Motion video of how the water in the bucket is not spilling out because of centripetal force

Q: What is centripetal force?

A: Centripetal force is what we call a force that is perpendicular to motion. A centripetal force can be any force, gravity, tension, friction, but it must be perpendicular to the motion of the object.

Q: Why is centripetal force circular?

A: Centripetal force is circular because the force acting on the object is a continuous perpendicular force. If the force is not constantly being acted upon the object, then it the motion will not be circular.

Q: What are some examples of centripetal force?

A: A car uses centripetal force to turn: the friction of the tire on the ground causes the turn. Also, a swinging a ball on a string uses centripetal force because the string has a tension force, causing the ball to move in a circle.

Q: If you were to cut the string attached to the ball as it was moving, what would happen?

A: The ball would move in a straight line in the direction of the velocity because of inertia. Here's a picture that better explains it: 

Q: What is centripetal acceleration? 

A: For every unbalanced force, there is acceleration. Because centripetal force is not a balanced force, there is centripetal acceleration. Centripetal acceleration is in the same direction as the centripetal force, which is ALWAYS inward. To calculate centripetal acceleration, use this equation: 

Ta-da! Hope you now have a better understanding on centripetal force!