問題詳情
76. A string is attached to the rear-view mirror of a car. A ball is hanging at the other end ofthe string. The car is driving around in a circle, at a constant speed. Which of thefollowing lists gives all of the forces directly acting on the ball?
(A) Tension
(B) Tension and gravity
(C) Tension, gravity, and the centripetal force
(D) Tension, gravity, the centripetal force, and friction10
參考答案