work, energy and power Flashcards
1
Q
energy
A
a calculated quantity that is conserved during any changes; that which is transferred when a force does work.
2
Q
work
A
w = Fs
3
Q
joule
A
the world done when a force of 1N moves a distance of 1m in the direction of the force.
4
Q
change in g.p.e
A
weight * change in height
5
Q
gravitational potential energy
A
the energy a body has due to its position in a gravitational field.
6
Q
principle of conservation of energy
A
energy cannot be created or destroyed. It can only be changed from one form to another
7
Q
power
A
the power of a device is the rate at which it does work per unit of time
