問題詳情

49. A 1.0-kg ball is attached to the end of an incompressible massless rod of length 1.0m to form a pendulum as shown in the figure below. The pendulum is released atposition 1 with velocity V1 = 0 m/s. At the lowest point of its swing, while it ismoving horizontally, the ball collides head-on with a 0.80-kg block initially restingon a frictionless surface at position 2. After the collision, the speed of the block isfound to be 3.0 m/s. What is thespeed of the ball after thecollision?


(A)0.0 m/s
(B)2.0 m/s to the left
(C)3.0 m/s to the right
(D)3.0 m/s to the left
(E)6.0 m/s to the right

參考答案

答案：B
難度：計算中-1
書單：沒有書單，新增