energy work power Flashcards
1
Q
energy
A
capacity to do work
2
Q
principle of conversation of energy
A
energy cannot be created nor destroyed, but can be converted from one form to another. the total energy in an isolated system is constant.
efficiency = (useful energy output/total energy input) x 100%
3
Q
work done by a constant force on an object
A
product of the force and the distance moved by the object in the direction of the force
W=F x s
4
Q
kinetic energy
A
E= 1/2 x m x v^2
5
Q
gravitational potential energy
A
E = mgh
6
Q
power
A
the rate of work done or the rate of energy conversion
P = W/t = E/t
