# 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?

- [math](BA)/(BC)[/math]
- [math](BC)/(BA)[/math]
- [math](AC)/(BA)[/math]
- [math](BA)/(AC)[/math]

2.

Which of the following statements would be true about the lever shown if C was moved closer to A?

- the ideal mechanical advantage would increase
- the ideal mechanical advantage would decrease
- 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 a:

- Class 1 Lever
- Class 2 Lever
- Class 3 Lever
- 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?

- 5 meters
- 0.2 meters
- 1 meter
- 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?

- 1/3
- 3
- 5
- 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?

- 0.5
- 1.0
- 2.0
- 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?

- 6 cm
- 35 cm
- 150 cm
- 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

B to A is 2 meters

A to C is 1 meter

- 0.5
- 1.0
- 1.5
- 2.0

9.

If a machine has a mechanical advantage less than one, which of the following must be true:

(Think carefully)

(Think carefully)

- The Effort Force is less than the Resistance Force
- The Effort Distance is greater than the Resistance Distance
- The Effort Distance is less than the Resistance Distance
- 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?

- 3.6 cm
- 3.6 m
- 10 cm
- 10 m

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