Compound IMA Review for test

y=dx What is y if x=4 and d=6

• 2

• 10

• 24

• 3/2

y=k/x What is y if x=5 and k=20

• 4

• 100

• 25

• 1/4

y=dx If d decreases does y get larger or smaller

• Smaller

• Larger

y=k/x If x decreases does y get larger or smaller

• Smaller

• Larger

You have a compound machine with a gear train and a pulley and belt system. The driver gear (input gear) has 5 teeth. The output gear has 20 teeth. The input pulley has a diameter of 5 mm. The output has a diameter of 35 mm. What is the IMA of the entire machine? Use printed formulas

• 11

• 4

• 7

• 28

MA = out/in If you have two gears, one has 10 teeth. The other has 30 teeth. If you want the largest possible MA, which should be the driver (input gear)?

• Either

• The 30 tooth gear

• The 10 tooth gear

MA = out/in If you have two gears, one has 50 teeth. The other has 25 teeth. If you want the smallest possible MA, which should be the driver (input gear)?

• The 50 teeth gear

• The 25 teeth gear

You have a lever system with a 3-meter long effort arm and a 0.5-meter long resistance arm. What is the IMA of the lever?

• 15

• 0.17

• 3.5

• 6

y=hx If h=6 and x=5, what is the value of y?

• 5

• 6

• 30

• 11

If a pulley system has a mechanical advantage of 4, what does that mean?

• This means that it is 4 times easier to lift this load.

• All of the above

• This means you only need a quarter of the effort to lift the load.

• For example, if you lifted 100 kg, it would only take 25 kg of effort.