Centripetal Acceleration - AP® Physics Definition

Reviewed by: Ann Howell

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In AP® Physics, centripetal acceleration is the component of an object’s acceleration directed toward the center of the object’s circular path. Centripetal acceleration is always directed toward the center of an object’s circular path along the radius of the circle.

According to Newton's second law the centripetal force that produces the centripetal acceleration is also directed towards the center of the circle.

Circular motion diagram explaining centripetal force (F) and acceleration (a) perpendicular to direction of travel (V), with velocity tangent to the circle.
Centripetal acceleration and centripetal force both act towards the center of the circle of an object undergoing uniform circular motion

Centripetal acceleration can result from a single force, more than one force, or components of forces exerted on an object in circular motion. The centripetal force can be any type of force, depending on the situation, which keeps an object moving in a circular path.

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Ann Howell

Reviewer: Ann Howell

Expertise: Physics Content Creator

Ann obtained her Maths and Physics degree from the University of Bath before completing her PGCE in Science and Maths teaching. She spent ten years teaching Maths and Physics to wonderful students from all around the world whilst living in China, Ethiopia and Nepal. Now based in beautiful Devon she is thrilled to be creating awesome Physics resources to make Physics more accessible and understandable for all students, no matter their schooling or background.

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