question_answer

While driving a car around a curve of 200 m radius, the driver notices that a simple pendulum hung to the roof of the car is making an angle of \[15{}^\circ \]to the horizontal. The speed of the car in km/h is:

A)  60.5                                      

B)  72.5                      

C)  82.5                      

D)         92.5

E)  106.5