POE Quiz

Simple machines redirect energy by manipulating:

• Force

• Distance

• Speed

• All of the above

What does the Actual Mechanical Advantage describe?

• The magnitude of the resistance force divided by the magnitude of the effort force

• The magnitude of the effort force divided by the magnitude of the resistance force

• The magnitude of the resistance distance divided by the magnitude of the effort distance

• The magnitude of the effort distance divided by the magnitude of the resistance distance

Which class of lever has the load between the effort and the fulcrum?

• Class 1

• Class 2

• Class 3

• Class 4

In which class of lever is the fulcrum positioned between the load and effort?

• Class 1

• Class 2

• Class 3

• Class 4

Which class of lever has the effort placed between the load and the fulcrum?

• Class 1

• Class 2

• Class 3

• Class 4

Calculate the Ideal Mechanical Advantage (IMA) for the lever shown in the diagram where the distance from the center of the rock to the fulcrum is 1 foot and the distance from the man to the fulcrum is 4 feet.

• 0.25

• 4

• 5

• Not enough information

Calculate the load of the rock if the effort by the man is 50 pounds and the Ideal Mechanical Advantage (IMA) of the lever is 4.

• 50 pounds

• 25 pounds

• 200 pounds

• 12.5 pounds

Calculate the Mechanical Advantage for the pulley system shown in the diagram.

• 1

• 2

• 3

• 4

If the pulley system shown in the diagram is used to lift a load of 100 pounds, how much effort must be applied?

• 100 pounds

• 50 pounds

• 33 pounds

• 25 pounds

Gear Ratios are used to change the __________ of __________.

• speed of rotation

• direction of rotation

• both A and B

• neither A nor B