| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.95 |
| Score | 0% | 59% |
Connected gears of different numbers of teeth are used together to change which of the following charasteristics of the input force?
energy |
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force |
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rotational direction |
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torque |
Connected gears of different numbers of teeth are used together to change the rotational speed and torque of the input force. If the smaller gear drives the larger gear, the speed of rotation will be reduced and the torque will increase. If the larger gear drives the smaller gear, the speed of rotation will increase and the torque will be reduced.
Boyle's law defines the relationship between pressure and volume as:
\(\frac{P_1}{P_2} = {V_1}{V_2}\) |
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\(\frac{P_1}{P_2} = \frac{V_2}{V_1}\) |
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\({P_1}{P_2} = {V_1}{V_2}\) |
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\(\frac{P_1}{P_2} = \frac{V_1}{V_2}\) |
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 \(\frac{P_1}{P_2} = \frac{V_2}{V_1}\)
Assuming force applied remains constant, which of the following will result in more work being done?
moving the object farther |
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moving the object with more acceleration |
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moving the object with more speed |
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increasing the coefficient of friction |
Work is accomplished when force is applied to an object: W = Fd where F is force in newtons (N) and d is distance in meters (m). Thus, the more force that must be applied to move an object, the more work is done and the farther an object is moved by exerting force, the more work is done.
Depending on where you apply effort and resistance, the wheel and axle can multiply:
speed or power |
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power or distance |
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force or speed |
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force or distance |
If you apply the resistance to the axle and the effort to the wheel, the wheel and axle will multiply force and if you apply the resistance to the wheel and the effort to the axle, it will multiply speed.
Which of the following is not a type of bridge?
truss |
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arch |
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cable |
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block |
The six basic bridge forms are beam, truss, arch, cantilever, cable, and suspension.