問題詳情
2. On a distant planet where the gravitational constant g = 6.0 m/s2, Sherlock Holmes dropped his pipefrom the roof of a building. Dr. Watson, in a room below, noticed the pipe flash past a window, taking0.30 seconds to cover the 1.5 m vertical dimension of the window. Exactly 1.4 seconds after passingthe bottom of the window on the way down, it passed it again on the way up, having made a perfectlyelastic collision with the level ground below. Calculate the height of the building.
(A) 7.1 m
(B) 11.6 m
(C) 9.4 m
(D) 4.8 m
(E) 8.5 m.
參考答案
答案:E
難度:計算中-1
書單:沒有書單,新增
用户評論
【用戶】按個讚
【年級】大一上
【評論內容】由公式h=1/2gt2 =1/2*6*(0.3+1.4)*(0.3+1.4)=8.67
【用戶】按個讚
【年級】大一上
【評論內容】由公式h=1/2gt2 =1/2*6*(0.3+1.4)*(0.3+1.4)=8.67