問題詳情
3.A 1.5-lb ball A is moving with a velocity of magnitude 18 ft/s when it is hit by a 2.5-lb ball B which has a velocity of magnitude 12 ft Is as shown in Figure 3. Knowing that the coefficient of restitution is 0.8 and assuming no friction, determine the velocity of each ball after impact. (25%)
參考答案
答案：A
難度：簡單0.771429
統計：A(81),B(10),C(3),D(1),E(0)