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# Ideal Mechanical Advantage of Levers (Grade 7)

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## Ideal Mechanical Advantage of Levers

1.
Which distances should be divided in order to calculate the ideal mechanical advantage of the lever shown?
1. $(BA)/(BC)$
2. $(BC)/(BA)$
3. $(AC)/(BA)$
4. $(BA)/(AC)$
2.
Which of the following statements would be true about the lever shown if C was moved closer to A?
1. The ideal mechanical advantage would increase.
2. The ideal mechanical advantage would decrease.
3. The ideal mechanical advantage would remain unchanged.
3.
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 which type of lever?
1. Class 1 Lever
2. Class 2 Lever
3. Class 3 Lever
4. Class 4 Lever
4.
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
5.
Greg sets up the lever shown to help him lift box A by pushing down at point C. If B is located 50 cm from A and 150 cm from C, what is the ideal mechanical advantage of the lever?
1. 1/3
2. 3
3. 5
4. 100
6.
On the lever shown, the distance from B to C is 2 feet and the distance from B to A is 4 feet. What is the ideal mechanical advantage of the lever?
1. 0.5
2. 1.0
3. 2.0
4. 8.0
7.
The ideal mechanical advantage of this lever is 5. If the distance from A to B is 30 cm, what is the distance from B to C?
1. 6 cm
2. 35 cm
3. 150 cm
4. 180 cm
8.
Calculate the ideal mechanical advantage of the lever shown, given the following distances:

B to A is 2 meters
A to C is 1 meter
1. 0.5
2. 1.0
3. 1.5
4. 2.0
9.
If a machine has a mechanical advantage less than one, which of the following must be true?
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.
10.
Russ is using a lever to lift a box. The lever has an ideal mechanical advantage of 6 and is set up as shown. If the distance from the fulcrum to the load is 60 cm, what is the distance from the fulcrum to the effort force?
1. 3.6 cm
2. 3.6 m
3. 10 cm
4. 10 m
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