Two identical cars are traveling around the same curve on a highway.One of them is moving at 60 mph,and the other is moving at 30 mph.The centripetal force acting on the car moving at 60 mph is __________ the value of the centripetal force acting on the car moving at 30 mph.
A)one quarter
B)one half
C)the same as
D)twice
E)four times

Question

Quizplus · Accepted Answer

The centripetal force is proportional to the square of the velocity. Therefore, if the speed doubles, the centripetal force increases by a factor of four.

Two Identical Cars Are Traveling Around the Same Curve on a Highway.One