A.两物体克服摩擦力做的功一样多 |
B.物体A克服摩擦力做的功多 |
C.两物体滑至底端时动能相等 |
D.物体B滑至底端时动能较大 |
S |
cosθ1 |
S |
cosθ2 |
S |
cosθ1 |
S |
cosθ1 |
S |
cosθ2 |
A.W1<2W2 | B.W1=2W2 | C.W1>W2 | D.W1=W2 |
A.x1:x2=1:5,v1:v2=1:3 | B.x1:x2=1:4,v1:v2=1:2 |
C.W1:W2=1:10,P1:P2=1:4 | D.W1:W2=1:8,P1:P2=1:6 |
A.
| B.
| C.
| D.
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