A.s1:s2=1:3v1:v2=1:2 | B.s1:s2=1:3v1:v2=1:
| ||
C.s1:s2=1:4v1:v2=1:2 | D.s1:s2=1:4v1:v2=1:
|
1 |
2 |
2 |
A.1:4 | B.1:3 | C.1:2 | D.1:1 |
A.该物体在2F力作用下,在时间t内运动了2s距离 |
B.该物体的质量为m/2时,仍在力F作用下,在时间t内运动了2s距离 |
C.若保持m、F不变,在时间2t内运动了2s距离 |
D.该物体在2F力作用下,在时间2t内运动了4s距离 |
© 2017-2019 超级试练试题库,All Rights Reserved.