Equations Flashcards
1
Q
Weight
A
Weight= mass X gravitational field strength W= mXg
2
Q
Work done
A
Work done= Force X distance
W= fXs
3
Q
Force applied to a spring
A
Force applied to a spring= spring constant X extension
F= kXe
4
Q
Distance travelled
A
Distance travelled= speed X time
S= vXt
5
Q
Acceleration
A
Acceleration= change in velocity divided by time taken A= triangleV divided by t
6
Q
Resultant force
A
Resultant force= mass X acceleration
F=mXa
7
Q
Momentum
A
Momentum= mass X velocity
P=mXv
8
Q
Kinetic energy
A
Kinetic energy= 0.5 X mass X speedsquared
Ek= 1/2XmXvsquared
9
Q
Gravitational potential energy
A
Gravitational potential energy= mass X gravitational field strength X height
Ep= mXgXh
10
Q
Power
A
Power= energy transferred divided by time P= E divided by T
11
Q
Power
A
Power= work done divided by time P= W divided by T
12
Q
Power
A
Power= potential difference X current P= vXi
13
Q
Power
A
Power= currentsquared X resistance P= isquared X r
14
Q
Efficiency
A
Efficiency= useful output energy transfer divided by total input energy transfer
15
Q
Efficiency
A
Efficiency= useful power output divided by total power input
