A.ma | B.F2 | C.F1-F2 | D.F2+ma |
F1-F2 |
m |
A.0.1 Kg | B.3 Kg | C.9 Kg | D.15 Kg |
A.若m>M,有x1=x2 | B.若m<M,有x1=x2 |
C.若µ>sinθ,有a1=a2 | D.若µ<sinθ,有a1=a2 |
A.F1变大,F2不变 | B.F1不变,F2变小 |
C.F1变大,F2变小 | D.F1变大,F2变大 |
A.方向水平向右 | B.方向向上偏右 |
C.方向竖直向上 | D.大小为0 |
© 2017-2019 超级试练试题库,All Rights Reserved.