Formative 7DE: Mechanical Advantage

A student used a claw hammer to remove nails from a piece of wood to prepare to paint. What is the effort distance for a claw hammer if the resistance distance is 6.0 cm and the mechanical advantage is 6.0?

• 1

• 12

• 30

• 36

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A ski lift acting as a ramp, with a length of 1500 meters, is used to bring skiers to a height of 500 meters. What is the mechanical advantage of the ski lift?

• 0.33

• 3

• 1,000

• 2,000

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A 12-meter long ramp is used to help lift a box to a height of 4 meters. What is the mechanical advantage of the ramp?

• 
  The mechanical advantage is 0.33.

• The mechanical advantage is 3.0.

• The mechanical advantage is 8.0.

• 
  The mechanical advantage is 16.0.

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A moving company uses a 5-meter long ramp to help load boxes into a van. What will most likely happen if the company uses a ramp with a length of 10 meters to lift boxes into the same van?

• 
  The amount of work accomplished will stay the same, and it will require the same amount of effort force.

• The amount of work accomplished will be doubled, and it will require the same amount of effort force.

• The amount of work accomplished will stay the same, and it will require half as much effort force.

• The amount of work accomplished will be half as much, and it will require twice the effort force.

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What is input force?

• the resistance force

• the force the machine exerts on the object

• the force of gravity on the object

• the force you exert on the machine

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Which of the following correctly identifies the output force?

• A

• B

• C

• D

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A lever and fulcrum are used to lift a fallen tree, which has a weight of 480 N. If the lever has a mechanical advantage of 5.5, what is the input force that will begin lifting the tree off the ground?

• 2,640 N

• 0.011 N

• 40.7 N

• 87.3 N

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Using a lever, Jessie is able to lift a 10,000 N car off of the ground with a force of 1000 N. What is the mechanical advantage of the lever?

• 1

• 10

• 1,000

• 37

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Using the picture above, identify the input and output arms of the lever.

• Arm A is the output arm, Arm B is the input arm.

• Arm A and B are both the input arms.

• Arm A and B are both the output arms.

• Arm A is the input arm, Arm B is the output arm.

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Travis was labeling a simple machine for science class. Look at the diagram above and label the input distance(s) and output distance(s).

• 
  A and B are both input distances

• A and B are both output distances

• A is the output distance, B is the input distance

• A is the input distance, B is the output distance

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