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