Vocabulary Flashcards
Work
Is the product of force and distance
Joule
Is the SI unit of work
Power
Is the rate of doing work
Wyatt
Is equal to one joule per second
Machine
They change the size of a force needed, the direction of a force or the distance over which a force
Input force
The force you exert on a machine
Work input
The work done by the input force acting through the input distance
Output force
The force that is exerted by a machine
Output distance
The distance the output force is exerted through
Work output
A machine is the output force multiplied by the output distance
Input distance
The distance the input force acts through
Mechanical advantage
Of a machine is the number of times that the machine increases an input force
Actual mechanical advantage
Equals the ratio of the output force to the input force
Ideal mechanical advantage
A machine is the mechanical advantage in the absence of friction
Efficiency
The percentage of the work input that becomes work output
