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Questions and Answers
What does mechanical advantage (MA) measure?
What does mechanical advantage (MA) measure?
- The speed at which the output moves
- The difference between input force and output force
- The ratio of input distance to output distance
- The ratio of output force to input force (correct)
What unit is used to measure force in mechanical advantage calculations?
What unit is used to measure force in mechanical advantage calculations?
- Kilograms (kg)
- Newtons (N) (correct)
- Joules (J)
- Pascals (Pa)
How does changing the input distance affect the output distance in a system with a constant speed ratio?
How does changing the input distance affect the output distance in a system with a constant speed ratio?
- Changing input distance has no effect on output distance
- Input distance and output distance are inversely proportional
- Increasing input distance decreases output distance
- Input distance and output distance are directly proportional (correct)
Flashcards
Mechanical Advantage
Mechanical Advantage
The ratio of output force to input force.
Input Force
Input Force
The force applied to the machine.
Output Force
Output Force
The force the machine applies to the object being moved.
Speed Ratio
Speed Ratio
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Mechanical Advantage Formula
Mechanical Advantage Formula
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Study Notes
Mechanical Advantage
- Mechanical advantage (MA) is the ratio of output force to input force.
- MA = Output force / Input force
- No units
Force
- Force is measured in Newtons (N).
- Applied to an object to cause movement or change in motion.
- Input force - force applied to a machine.
- Output force - force applied by the machine to an object.
Speed Ratio
- Speed Ratio (SR) = Input distance / Output distance
- No units
Solving for Input/Output Distance
- Input distance = Output distance x Speed Ratio (SR)
Examples
- A pulley system has a mechanical advantage of 5. This means the output force is 5 times greater than the input force.
- A person pulls a rope (input) 12 meters and lifts a box (output) 4 meters. The speed ratio of the pulley is 3.
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