Chapter 14 Vocab Flashcards
Define work
Work is the product of distance and the force in the direction an object moves.
Define Joule
Joule (J) is the SI unit of work, equal to 1 Newton-meter.
Define Power
Power is the rate of doing work.
Define watt
Watt (W) is the SI unit of power, equal to one joule per second
Define machine
A machine is a device that changes a force.
Define input force
Input force is the force exerted on a machine
Define input distance
Input distance is the distance through which the input force acts in a machine
Define work input
Work input is the work done on a machine as the input force acts through the input distance
Define output force
Output force is the force exerted by a machine
Define output distance
Output distance is the distance an output force acts through in a machine
Define work output
Work output is the work done by a machine as the output force acts through the output distance
Define mechanical advantage
Mechanical advantage is the number of times that a machine increases an input force
Define actual mechanical advantage
Actual mechanical advantage is the ratio of the output force to the input force in a machine
Define ideal mechanical advantage
Ideal mechanical advantage is the mechanical advantage of a machine in the absence of friction
Define efficiency
Efficiency is the percentage of the work input that becomes work output in a machine
