Kinematics Formulae

Question	Answer
Speed	speed = distance / time v = Δs / Δt
Acceleration	acceleration = change in velocity / time taken a = Δv / Δt
First equation of motion	final velocity = initial velocity + accelerationxtime v = u + at
Second equation of motion	displacement = ½ (initial velocity + final velocity) x time s = ½ (u + v)t
Third equation of motion	displacement = initial velocityxtime + ½ accelerationxtime^2 s = ut + ½ at^2
Fourth equation of motion	displacement = initial velocity (final velocity – initial velocity / acceleration) = ½ acceleration (final velocity – initial velocity / acceleration) squared s = u(v – u / a) + ½ a(v – u / a)^2
Fifth equation of motion	final velocity squared = initial velocity squared + 2 accelerationxdisplacement v2 = u2 + 2as
Weight	weight = mass x gravitational field strength W = M x g
Joules	Joules = newton x meter J = N x m → 1J = 1Nm
Kinetic energy	Kinetic energy = 0.5 x mass x velocity or speed KE = 0.5mv^2
Terminal velocity	Terminal velocity = square root (2 x mass x gravity)/(density x projected area x drag coefficient) V = √(2mg)/(ρAC)
Gravity	Force = mass x acceleration F = m x a
Density	Mass/unit volume ρ = m/vol

Resource summary

	Created by Christine Laurich over 9 years ago