Uniform circular motion is the direct consequence of:
A)Newton's third law
B)a force that is always tangent to the path
C)an acceleration tangent to the path
D)a force of constant magnitude that is always directed away from the same fixed point
E)a force of constant magnitude that is always directed toward the same fixed point

Question

Quizplus · Accepted Answer

Uniform circular motion occurs when an object moves in a circular path at a constant speed. This requires a force to constantly change the direction of the object's velocity but not its magnitude, which is what a force of constant magnitude that is always directed toward the same fixed point (i.e. center of the circle) does. Therefore, choice E is the best answer.

Uniform Circular Motion Is the Direct Consequence Of