問題詳情

7.tA 2.0-kg block starts from rest on the positive x axis 3.0 m from the origin and thereafter has an acceleration given by

. The torque, relative to the origin, acting on it at the end of 2.0 s is:
(A) (0 N●m)


(B)(-18N●m) 


(C) (+24 N●m) 

 
(D)(-I44N●m) 


(E) (+144 N● m) 

.

參考答案

答案：99

統計：A:0,B:0,C:0,D:0,E:0

難度：計算中