Terms
-
Energy
The ability to do work.
-
Work
A force applied over a distance. For formulae, see work done by a constant
force parallel to displacement and work done by
any constant force, and
work done by a position-dependent force.
-
Joule
The units of work, equivalent to a Newton-meter. Also units of energy.
-
Kinetic Energy
The energy of motion.
-
Power
Work done per unit time. For formulas, see Formula for average
power,
Definition of instantaneous power, and formula
for instantaneous
power.
-
Watt
Unit of power; equal to joule/second.
Formulae
|
Work done by a constant force parallel to displacement
| W = Fx |
|
Work done by any constant force
| W = Fx cosθ |
|
Work-Energy Theorem
| W = ΔK |
|
Formula for average power
|  =  |
|
Definition of instantaneous power
| P =  |
|
Formula for instantaneous power
| P = Fv cosθ |
|
Work done by a position-dependent force
| W =  F(x)dx force.
|
