試題詳解

35. A bullet weighing 100 g is diagonally fired into the end of a 0.5 m long stick with a speed of v0. The stick is suspended at point P. The rotational inertia of the stick relative to point P is 0.05 kg · m². When the bullet first enters the stick, the stick's angular velocity is 5.0 rad/s. What is the initial velocity of the bullet?
(A) 7 m/s
(B) 10 m/s
(C) 15 m/s
(D) 30 m/s
(E) 40 m/s