Equations Flashcards
1
Q
Power (joules/second)
A
Energy transferred/time
2
Q
Power (watts/second)
A
Work done/time
3
Q
Weight ( newtons)
A
Mass x gravitational field strength
4
Q
Power (electrical)
A
Potential difference x current
5
Q
Power (electrical 2)
A
(Current)2 x resistance
6
Q
Pressure (pascals 1 newton/m2)
A
Force/surface area
7
Q
Density (kg/m3)
A
Mass/volume
8
Q
Efficiency (power)
A
Useful power output/total power input
9
Q
Efficiency
A
Useful output energy transfer/total input energy transfer
10
Q
Force applied to a spring (newtons)
A
Spring constant x extension
11
Q
Distance (meters)
A
Speed x time
12
Q
Kinetic energy
A
0.5 x mass x (speed)2
13
Q
Work done
A
Force x distance
14
Q
Moment of a force
A
Force x distance
15
Q
Acceleration
A
Change in velocity/time taken
