| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.88 |
| Score | 0% | 58% |
| -5 | |
| 0.58 | |
| 7 | |
| 12 |
The mechanical advantage of a wheel and axle is the input radius divided by the output radius:
MA = \( \frac{r_i}{r_o} \)
In this case, the input radius (where the effort force is being applied) is 7 and the output radius (where the resistance is being applied) is 12 for a mechanical advantage of \( \frac{7}{12} \) = 0.58
Boyle's law defines the relationship between pressure and volume as:
\(\frac{P_1}{P_2} = \frac{V_2}{V_1}\) |
|
\(\frac{P_1}{P_2} = \frac{V_1}{V_2}\) |
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\({P_1}{P_2} = {V_1}{V_2}\) |
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\(\frac{P_1}{P_2} = {V_1}{V_2}\) |
Boyle's law states that "for a fixed amount of an ideal gas kept at a fixed temperature, pressure and volume are inversely proportional". Expressed as a formula, that's \(\frac{P_1}{P_2} = \frac{V_2}{V_1}\)
The science that deals with motion and the forces that produce motion is called which of the following?
engineering |
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physics |
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mechanics |
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aeronautics |
Mechanics deals with motion and the forces that produce motion.
Which of the following is not a type of simple machine?
lever |
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pulley |
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gear |
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screw |
The six types of simple machines are the lever, wheel and axle, pulley, inclined plane, wedge, and screw.
Hydraulics is the transmission of force through the use of which of the following?
air pressure |
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torque |
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gear systems |
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liquids |
Hydraulics is the transmission of force through the use of liquids. Liquids are especially suited for transferring force in complex machines because they compress very little and can occupy very small spaces. Hydraulic pressure is calculated by dividing force by the area over which it is applied: P = F/A where F is force in pounds, A is area in square inches, and the resulting pressure is in pounds per square inch (psi).