試題詳解

52. As shown in the figure below, a uniform thin stick of mass M and length L is held vertically by two strings of negligible mass. What is the linear acceleration in the middle of the stick when one of the strings is cut? (Hint: The moment of inertia of the stick is I = ML²/3 for an axis through one end.)

(A) 1.50 g
(B) 1.0 g
(C) 0.75 g
(D) 0.50 g
(E) 0.25 g