1 |
2 |
v | 20 |
mgsinθ-μmgcosθ |
m |
1 |
2 |
|
1 |
2 |
1 |
2 |
v | 21 |
1 |
2 |
v | 20 |
1 |
2 |
1 |
2 |
v | 22 |
2 |
2 |
2 |
2 |
A.16m | B.12m | C.36m | D.24m |
A.传送带静止时,小物块受力应满足mgsinθ>mgμcosθ |
B.若传送带顺时针转动,小物块将不可能沿传送带滑下到达底端 |
C.若传送带顺时针转动,小物块将仍能沿传送带滑下,且滑到底端的时间等于t0 |
D.若传送带逆时针转动,小物块滑到底端的时间小于t0 |
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