Equations
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Distance travelled = s(m) =
Speed X Time v(m/s) x t(s)
Energy
Potential energy x Charge
Charge
Current x Time
Momentum = p (kgm/s)
Mass x Velocity m(kg) x v(m/s)
Wave speed
Frequency x wavelength
Potential difference
Current x Resistance
Kinetic Energy = E (J) = k
0.5 x mass x speed^2 0.5 x m(kg) x (v)^2 (m/s^2)
Gravitational Potential Energy (GPE) = E (J) p
Mass x gravitational field strength x height m(kg) x g(N/kg) x h(m)
Efficiency(power=
Useful energy output - - - - - - - - - - - - - - - - - - (Energy can be power) Total energy input
Power (Work done) = P (w) = W (J) - - - - - t (s)
Work done Energy transferred —————– = —————————– Time taken. Time taken
Total resistance =
Resistance of component 1 + resistance of component 2
Power =
Current x potential difference
Power(current)=
(Current)^2 x resistance
Energy transferred = E(J) =
Power x time P (W) x t (s)
Energy transferred =
Charge flow x potential difference
Density =
Mass - - - - - - Volume
Weight = W(N) =
Mass x gravitational field strength m(kg)x g(N/kg)
Work done = Work(J) =
Force x distance F(N) x s(m)
Force Applied to a Spring = F(N) =
Spring constant x extension k(N/m) x e(m)
Moment of a force
Force x distance
Pressure =
Force normal to a surface - - - - - - - - - - - - - - - - - - - - - Area of that surface
Acceleration = a (m/s^2)
Change in velocity v(m/s) - - - - - - - - - - - - - - - = - - - - - - Time taken t(s) OR final velocity - initial velocity - - - - - - - - - - - - - - - - - - - - - - - Time taken
Resultant force = F(N) =
Mass x Acceleration M(kg) x a(m/s^2)
Energy =
Mass x SHC x change in temperature (SHC=Specific heat capacity)