Displacement-time graph (More detailed in notes)
Gradient=Velocity
Gradient slope up/down=V is constant
Gradient is constant=V is 0
Velocity-time graph (More detailed in notes)
Gradient=Acceleration
Gradient slope up/down=V is constant
Gradient is constant=V is 0
Area under the graph=Displacement
How to find Velocity?
Displacment / Time
How to find Acceleration?
v2-v1 / t2-t1
How to find weight?
W=mg
Mass x Gravitational field strength (eg. 10N/kg)
How to find mass?
Mass=W/g
Weight / Gravitatinal field strength (eg. 10n/kg)
How to find resultant force?
Fnet = ma
Resultant force = Mass x Acceleration
Work done
W = FxS
Work = Force x distance
How to find KE?
KE: 1/2 mv2
1/2 x mass x velocity squared
How to find GPE?
GPE=mgh
GPE= mass x gravitationa field strength x height
How to find Power?
P = W/t or E/t
Power= Watt(s) / time or Energy / time
How to find (energy) efficiency
Efficiency = useful energy output/ total energy out put x 100%
How to find Moments?
M = F x d
Moments = Force x perpendicular distance
How to find Density?
ρ = m/v
Density (rho) = Mass/Volume
How to find Pressure?
P = F/A
Pressure = Force/Surface Area
How to find pressure of liquid?
Pliquid = hρg
Pliquid = Height x Density x Graviational field strength
How to find frequency of waves?
f = 1/T
Frequency = 1/Period (s)
How to find Wave speed?
v = fλ
Wave speed (m/s) = Frequency x Wave length
