本题目来源于试卷: Work Energy and Power，类别为 美国物理杯赛(Physics Bowl)
[单选题]
03.49: A sled slides up a uniform incline of unknown an pr1i1 35v dyo kw:o)fvgle. The 7 vcb;v. h*e x5p3vybtvc;k*7vtxy.k sled, which started at the bottom of the incline moving at 10.0 m/s, rises to a height of 3.30 m above its starting position and momentarily comes to rest. The sled then slides back down the hill. What is the sled's speed when it returns to its original position at t vy5pc tvx3ybvck7;7v. . ;e vbt*kx*hhe bottom of the hill?
A. 10.0 m/s
B. 8.1 m/s
C. 5.7 m/s
D. 4.0 m/s
E. It cannot be determined, as θ is required
参考答案: C
本题详细解析:
暂无
| 
