問題詳情
31. An object of mass m is sliding with speed v at some instant across a level tabletop, with which itscoefficient of kinetic friction is µ. It then moves through a distance d and comes to rest. Which ofthe following equations for the speed v is reasonable? (Gravitational acceleration is g)
(A) (2μgd)1/2
(B) (mgd)1/2
(C) (2μmgd)1/2
(D) (2μgd)-1/2
(E) (2μd)1/2
參考答案
答案：A
難度：計算中-1
書單：沒有書單，新增