POE Review

What is the Ideal Mechanical Advantage (IMA) of the First Class lever shown in the image?

• A. 8

• B. 0.4

• C. 2.5

• D. 0.5

What is the Actual Mechanical Advantage (AMA) of the Second Class lever depicted in the image?

• A. 3

• B. 2.5

• C. 15

• D. 2

Find the Force Effort (FE) of the wheel and axle system shown in the image, assuming AMA equals IMA.

• A. 3.2 lbs

• B. 102.4 lbs

• C. 64 lbs

• D. 100 lbs

What is the efficiency of a pulley with 7 supporting stands, an effort force of 250 lb applied, and a resistance force of 1200 lb?

• A. 86%

• B. 117%

• C. 69%

• D. 146%

Assuming AMA equals IMA, what is the required effort force to push the 50 pound cart up the ramp as shown in the image?

• A. 187 lbs

• B. 13.3 lbs

• C. 3.75 lbs

• D. 42 lbs

How many teeth does Gear B have if it has 3 ½ times the torque of Gear A, which has 10 teeth?

• A. 40

• B. 20

• C. 25

• D. 35

If Gear C has a torque of 400, what is the torque of Gear A?

• A. 400

• B. 200

• C. 250

• D. 300

If Gear A is rotating at 48 RPMs, how fast is Gear C rotating?

• A. 32 RPMs

• B. 30 RPMs

• C. 48 RPMs

• D. 76.8 RPMs

If Gear A has a Torque of 15, what is the torque of gear D?

• A. 125ft/lb

• B. 18ft/lb

• C. 75ft/lb

• D. 150ft/lb

If Gear A has a speed of 5000 RPM, what is the speed of Gear C?

• A. 12500 RPMs

• B. 3333 RPMs

• C. 1500 RPMs

• D. 2000 RPMs