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Levers/Mechanical Advantage (Grade 9)

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Levers/Mechanical Advantage

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. 
When using a broom to sweep a floor, your mechanical advantage will be less than 1 and your fulcrum will be your hand at the top of the broom. This means the broom acts as a:
  1. Class 1 Lever
  2. Class 2 Lever
  3. Class 3 Lever
  4. Class 4 Lever
2. 
A standard bottle opener is an example of what type of lever?
  1. Class 1 Lever
  2. Class 2 Lever
  3. Class 3 Lever
  4. Class 4 Lever
3. 
A catapult is best described as what type of lever?
  1. Class 1 Lever
  2. Class 2 Lever
  3. Class 3 Lever
  4. Class 4 Lever
4. 
Jacob positions a class 1 lever so that the end he pushes down on is 0.5 m from the fulcrum. The object he is trying to lift is 0.1 m from the fulcrum. What is the IMA of the lever as he has it set up?
  1. 0.2
  2. 0.5
  3. 5
  4. 2
5. 
Mr. D needs to create a lever with a mechanical advantage of 0.4. If he is going to apply his force 2 meters from the fulcrum, how far away must his load be from the fulcrum to get the correct mechanical advantage?
  1. 5 meters
  2. 0.2 meters
  3. 1 meter
  4. None of the Above
6. 
Which of the following could knowing the mechanical advantage of a machine tell you?
  1. If the machine increases the effort force.
  2. If the machine increases the effort distance.
  3. If the machine does not change your effort force.
  4. All of the above
7. 
If a machine has a mechanical advantage less than one, which of the following must be true:
(Think carefully)
  1. The Effort Force is less than the Resistance Force
  2. The Effort Distance is greater than the Resistance Distance
  3. The Effort Distance is less than the Resistance Distance
  4. The Effort Force and Resistance Force are the same.
8. 
Which of the following is true about a single, fixed pulley?
  1. It has a mechanical advantage less than 1
  2. It has a mechanical advantage equal to 1
  3. It has a mechanical advantage greater than 1
  4. It has no friction.
9. 
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
10. 
Austin needs to lift a 300 N object using only 100 N of force. To accomplish this, he will need a simple machine with a mechanical advantage of what?
  1. 3
  2. 0.3
  3. 90%
  4. None of the Above
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