work energy power Flashcards
1
Q
work done on an object by a force
A
define as the product of the magnitude of the force and the component of the displacement in the direction of the force
2
Q
formula for kinetic energy
A
1/2 mv^2
3
Q
formula for potential energy
A
mgh
4
Q
power
A
define as the rate at which work is done
5
Q
formula for power
A
work done/time
force x avg velocity
6
Q
formula for efficiency
A
energy output/energy input x100%
7
Q
principle of conservation of energy
A
the principle of conservation of energy states that energy cannot be created or destroyed, but can be converted from one form to another. the total energy is an isolated system in constant.
8
Q
when is work done
A
work is done when there is force applied as well as distance moved in the direction of the force
