Work And Machines Flashcards
Joule
The amount of work you do when you exert a force of 1 newton to move an object a distance of 1 meter.
Work
Force exerted on an object that causes it to move.
Power
The rate at which one form of energy is transformed into another.
Watt
The unit of power when one joule of work is done in one second.
Machines
A device that changes the amount of force exerted, the distance over which a force is exerted, or the direction in which force is exerted.
Input force
The force exerted on a machine.
Output force
The force exerted on an object by a machine.
Mechanical advantage
The number of times a machine increases a force exerted on it.
Efficientcy
The percentage of the input work that is converted to output work.
Simple machine
The most basic device for making work easier, these are the smaller building blocks for complex machines.
Inclined plain
A simple machine that is a flat, sloped surface.
Wedge
A simple machine that is an inclined plane that moves.
Screw
A simple machine that is an inclined plane wrapped around a central cylinder to form a spiral.
Lever
A simple machine that consists of a rigid bar that pivots about a fixed point.
Fulcrum
The fixed point around which a lever pivots.
