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## Inclined Planes

Instructions: Read each question carefully. Choose the answer that best fits the question. Short answer response questions must be responded to in complete sentences. If the question involves calculations, you must show all your math work.

1.
Jestin built a ramp to help move stuff up into the back of his scary van. If he uses the ramp to help him do work, which of the following will be true?
1. His effort force and effort distance will remain the same. His MA = 1.
2. His effort distance will decrease, his effort force will increase. His MA > 1.
3. His effort distance will increase, his effort force will decrease. His MA > 1.
4. His effort force will increase, his effort distance will decrease. His MA < 1.
2.
Elizabeth pushes a box 12 meters up a ramp to load a truck that is 2 meters off the ground. What is the ideal mechanical advantage of the ramp?
1. 0.17
2. 6
3. 2
4. None of the Above
3.
How does a ramp make work easier?
1. By giving you more output work than you input
2. By giving you more output force than you input
3. By giving you less output work than you input
4. By changing the direction of your force
4.
Curtis is building a model pyramid in his backyard. The final 500 kg block will have to be moved into a position 5.0 meters above the ground. Curtis can push the block on rollers up a ramp with a force of 1000 N. How long does he need to make the ramp?
1. 28.2 m
2. 24.5 m
3. 49 m
4. 4.9 m
5.
A 5-meter ramp lifts objects to a height of 0.75 meters. What is the mechanical advantage of the ramp?
1. 0.15
2. 6.7
3. 3.75
4. impossible to determine
6.
Joey's little brother makes a ramp to push his toy dump truck up to his sandbox. If he uses 5 N of force to push the 12 N truck up the ramp, what is the mechanical advantage of his ramp?
1. 6.0
2. 0.42
3. 2.4
4. 23.5
7.
A ramp with a mechanical advantage of 4 is used to move a 38-newton load. What input force is needed to push the load up the ramp?
1. 0.11
2. 15.2
3. 9.5
4. 3.9
8.
Terrence wheels his wheelchair up a ramp using a force of 93 N. If the ramp has a mechanical advantage of 7, what is the output force?
1. 13.3N
2. 651N
3. 66.1N
4. 65.1N
9.
A road sign through the Rocky Mountains says the road going up the side of a mountain pass at a 5% grade; i.e., there is a 5 m gain in altitude for every 100 m of distance along the road. What is the mechanical advantage of the road?
1. 5
2. 20
3. 25
4. 0.05
10.
A ramp with a mechanical advantage of 13 lifts objects to a height of 11 meters. How long is the ramp?
1. 0.84 m
2. 1.2 m
3. 143 m
4. 14.3 m
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