問題詳情
33.tA system comprises three particles with masses of 2.0 kg, 3.0 kg, and 5.0 kg, respectively. A force F = 3.0i + 4.0j (N) acts on the 2,0-kg particle, where i and/ are unit vectors that point along x and y coordinate axes, respectively. What is the acceleration of the center of mass ac caused by the force?
(A)tac = 0.30i+ 0.40j (m/s2)
(B)tac = 0.60i + 0.80j (m/s2)
(C)tac = 3.0i +1.0j (m/s2)
(D)tac = 3.0i + 4.0j (m/s2)
(E)tac = 15i + 20j (m/s2)
參考答案
答案：A
統計：A:1,B:0,C:0,D:0,E:0
難度：計算中