A.小球过B点的速度 |
B.小球过B点的速度 |
C.小球离开B点后做平抛运动 |
D.小球离开B点后继续做半径为2.0m的圆周运动直到与A点等高的D点 |
A.v′A ="3" m/s、v′ B =" 3.5" m/s | B.v′A ="3.2" m/s、v′ B =" 3.2" m/s |
C.v′A =-2 m/s、v′ B =" 11" m/s | D.v′A ="5" m/s、v′ B =" 0.5" m/s |
A.1: 2 | B.4: 5 |
C.: 1 | D.4: 3 |
A. | B. | C. | D.无法确定 |
© 2017-2019 超级试练试题库,All Rights Reserved.