Work ,Energy And Power Flashcards
1
Q
Work
A
The product of force and displacement
W=fs
2
Q
Energy
A
The ability to do work
3
Q
2 types of energy
A
Kinetic , potential
4
Q
Kinetic energy
A
The energy an object has due to its motion EK=1/2mvsquared
5
Q
Potential energy
A
The energy an object has due to its position in a gravitational field
E=mgh
6
Q
Principle of conservation of energy
A
States that energy cannot be created or destroyed but only converted from one to another
7
Q
Power
A
The rate of which work is done
8
Q
The kilowatt hour
A
Number of kilowatt x number of hours
9
Q
Percentage efficiency
A
Useful power out over in x 100
10
Q
The solar constant
A
A measure of energy from the sun falling on each square metre of the earths surface in one second
