Answer to Question #76958 in Mechanics | Relativity for jewley

Question

Which of the following is true of an object undergoing uniform circular motion?

A) The objects speed is constant, so the net force on the object is zero.

B) The net force on the object points in the same direction as its position vector.

C) The objects acceleration points tangent to the circle.

D) The net torque on the object is zero.

Please explain.

Answer 1

D) The net torque on the object is zero - True

false:
a) The net force on the object is zero only if the velocity is constant.
b) The net force on the object points in the opposite direction as its position vector.
c) The objects acceleration points to the center of the circle.