7
lesson pretestMultiple Choice

Pretest

Question 7 • Physics I

A centripetal force causes circular motion because it accelerates an object

Answer
A
along the edge of a circle, which changes the speed of motion but not the direction.
B
toward the center of a circle, which changes the direction of motion but not the speed.
C
along the edge of a circle, which changes the direction of motion but not the speed.
D
toward the center of a circle, which changes the speed of motion but not the direction.

Explanation

Centripetal acceleration points toward the center of the circle. This acceleration continually changes the direction of the object's velocity, keeping it on a circular path, but it does not change the speed when the motion is uniform. So the correct choice is “toward the center of a circle, which changes the direction of motion but not the speed.”

AI-written and checked against the verified answer.

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