Motion And Forces Chapter 4 and 5 Flashcards
(20 cards)
Stored energy
Potential energy
The energy of motion
Kinetic energy
A law stating that no matter how energy is transferred or transformed, all of the energy is still present in one form or another
Conservation of energy
The unit of measurement of power
Watt
A unit used to measure energy and work
Joule
The unit of measurement of power for engines and motors
Horsepower
A combination of kinetic energy and potential energy an object has
Mechanical energy
The use of force to move an object over a distance
Work
The rate at which work is done
Power
Any device that makes doing work easier
Machine
The number of times a machine multiplies the input force
Mechanical advantage
The percentage of the input work done on a machine that the machine can return in output work
Efficiency
One of the basic machines on which all other mechanical machines are based
Simple machine
A solid bar that rotates rotates, or turns, around a fixed a point
Lever
A fixed point around which a lever rotates
Fulcrum
A simple machine that is a wheel attached to a shaft or axle
Wheel and axle
A wheel with a grooved rim that turns on an axle
Pulley
A simple machine that is a sloping surface
Inclined plane
A simple machine that has a thick end and a thin end
Wedge
A simple machine that is an inclined plane wrapped around a cylinder
Screw
