Equations Flashcards
Weight =
mass x Gravitational field strength
W = mg
Force applied to a spring =
spring constant x extension
F = ke
Acceleration =
Change in velocity/ time taken
a = Δv/t
Momentum =
mass x velocity
p = mv
GPE =
mass x GFS x height
Ep = mgh
Power =
Work done
Work done/time
P = w / t
Efficiency =
Useful power output/total power input
Charge flow =
Current x time
Q = It
Power =
pd
Potential difference x current
P = VI
Energy transfer =
Power
Power x time
E = pt
Density =
Mass / Volume
p = m/v
Work done =
Force x distance (along the line of action of the force)
W = Fd
Distance travelled =
Speed x time
D = vt
Resultant force =
Mass x acceleration
F = ma
Kinetic energy =
0.5 x mass x (speed)^2
Ek = 0.5mv^2
Power =
Energy transferred
Energy transferred / time
P = E/t
Efficiency =
Energy transfer
Useful output energy transfer / useful input energy transfer
Wave speed =
Frequency x wavelength
v = fλ
Potential difference =
Current x resistance
V = IR
Power =
Current
Current^2 x resistance
P = I^2 R
Energy transferred =
Charge flow
Charge flow x Potential difference
E= QV
Pressure =
Force normal to the surface / Area of the surface
p = F / A
Moment of a force =
Force x distance from the pivot (normal to the direction of the force)
M = Fd
Define each equation in:
PIVIR EVQIT
P = IV (Power = Current x pd)
V = IR (Potential Difference = Current x Resistance
OHM’S LAW)
E = VQ (Energy transferred = Pd x Charge flow)
Q = IT (Charge flow = Current x time)
