Simple Machine Test

Which of the following is the formula for the Ideal Mechanical Advantage of a Screw?

• $IMA\ =\ \frac{C}{P}$

• $IMA\ =\ \frac{F_R}{F_E}$

• $IMA\ =\ \frac{D_R}{D_E}$

• $IMA\ =\ \frac{Radius}{Threads\ Per\ Inch}$

How do you determine what kind of lever is being used?

• The length of the lever

• The Ideal Mechanical Advantage

• By what is located in the middle

• The height of the fulcrum

What is the Ideal Mechanical Advantage of the inclined plane?

• 0.6:1

• 1.7:1

• 1.25:1

• 1.3:1

What is the mechanical advantage of the pulley system?

• 5:1

• 2:1

• 3:1

• 4:1

What is the PITCH of this bolt?

• 3/8

• 16

• 8

• 0.0625

Kevin uses a wedge to split wood. If his wedge is 4 inches long, and 1 inch wide at the end opposite the cutting edge, how much force will he need to apply in order to get the 36 pounds of force required to split a piece of wood?

• 9 pounds

• 4 pounds

• 36 pounds

• 18 pounds

While driving, a normal human will apply about 4 pounds of force to the steering wheel to get the 28 pounds needed to turn the car. If the steering column connected to the wheel assembly is 2 inches across, how big must the steering wheel be?

• 7 inches

• 8 inches

• 54 inches

• 14 inches

If it requires 5 pounds of force to move the 16 pound weight, what is the efficiency of the system?

 $Effieciency\ =\ \frac{AMA}{IMA}\times100\%$  

• 3.2

• 80%

• 0.80%

• 125%

What is the purpose of using a Simple Machine?

• To make life simple

• To decrease the amount of work done

• To decrease the amount of force required

• To decrease the distance required

Which of the following is true in a world without friction?

•  $AMA\ =\ \frac{F_E}{F_R}$  

•  $IMA\ =\ \frac{D_R}{D_E}$  

•  $IMA\ =\ \frac{1}{TPI}$  

•  $\frac{D_E}{D_R}\ =\ \frac{F_R}{F_E}$