Chapter 14 Vocab Flashcards
Work
The product of force and distance
Joule
The SI unit for work
Power
The rate of doing work
Watt
The SI unit for power
Machine
A device that changes
Input force
The force you exert on a machine
Input distance
The distance the input force acts through
Work input
The work done by the input force acting through the input distance
Output force
The force exerted by a machine
Output distance
The distance the output force exerted
Work output
The output force multiplied by the output distance
Mechanical advantage
The number of times the machine increases an input forc
Actual mechanical advantage
Determined by measuring the actual forces acting on a machine, this equals the ratio of the output force to the input force
Ideal mechanical advantage
The mechanical advantage in the absence of friction
Efficiency
The percentage of the work input that becomes work output in a machine
