Energy Flashcards
Kinetic and potential energy are both forms of
Mechanical energy
Mgh is the formula for
Potential
(MV^2)/2 is the formula for
Kinetic energy
Going uphill potential energy ______ going downhill potential energy _______.
Increases, decreases
For an object to do work it must have
Energy
Ratio of work output to input is called
Efficiency
Output is always _____ then input
Less then
Unit of efficiency
__._%
Unit of work
Joule
Two units of power
Watt and horsepower
Unit of force
Newton
Fuuuuuuuck the rest are word problems
I do ain’t word good so I’m gonna skip
Definition of efficiency
The ratio of work output over work input, answered in a percentage, nothing is 100%
Definition of energy
The ability to do work
Definition of energy transformation
Energy changing from one form to another
Ex: electrical energy -> thermal energy
Definition of heat
Thermal energy that is moving or capable of moving
Definition of Horsepower
Unit of power, = to 746 watts
Definition of Joule
Unit of energy and work, Equal to 1 Newton times 1 meter
J= NM same as W= FD
Definition of kinetic energy
Energy of motion
Definition of potential energy
Energy that is stored, comes from position
Law of conservation of energy
Energy cannot be created or destroyed, it can only be transformed
Definition of power
The rate of doing work
Definition of watt
Unit of power
Definition of work
Force times distance, but the force applied must be in the same direction as the distance it moves
Ex: lifting, pushing, pulling, throwing
NOT ex: carrying, tug of war and being a tie or losing, carrying up stairs
Increase in height will also increase
Potential energy
