check answers
1. A box of cleaning supplies weighs 15n.if the box is lifted a distance of 0.60m,how much work is done?
A. 0.040 j
B.9 j
C.14 j (I PICK THIS)
D.25 j
2.to chop wood you apply 50.0n of force to an ax. The ax applies 600.0n of force to the wood. What is the mechanical advantage of the ax?
A. 650.0 (I PICK THIS)
B. 8.3
C. 12.0
D. 0.0833
3.you do 185 j of work pulling a cart up a ramp. if the ramp does 153 j of work, what is the efficiency of the ramp?
A. 82.7 percent
B. 121.0 percent(I PICK THIS)
C. 32.0 percent
D. 338.0 percent
4.remy noticed that after oiling his skateboard wheels, it was easier to reach the speeds he needed to perform his tricks. How did the oil help??
A. the oil reduced friction between the moving parts of the skateboard.
B. the oil increased friction between the moving parts of the skateboard(I PICK THIS
C. the oil reduced friction between the skateboard wheels and the ground.
D. The oil increased friction between the skateboard wheels and the ground
1. B
2. C
3. A
4. A
5. D
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1. B
2. C
3. A
4. A
The last one is d
Your doomed
What about the last one? Matt forgot to put up question #5
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b
c
a
a
d
5/5 100%
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