Physics Equations and Units Flashcards
What is the equation that links mass, gravitational field strength and weight?
weight = mass x gravitational field strength W = m x g
What is the equation that links work done, force and distance?
Work done = force x distance W = F x s
What is the equation that links force applied to a spring, spring constant and the extension?
Force applied to a spring = spring constant x extension F = k x e
What is the equation that links distance, speed and time
distance = velocity x time s = v x t
What is the equation that links acceleration, chance in velocity and time taken?
acceleration = chance in velocity / time a = (v-u)÷t
What’s the equation that links resultant force, mass and acceleration?
resultant force = mass x acceleration F = m x a
What’s the equation that links momentum, mass and velocity? (Higher only)
momentum = mass x velocity p = m x v
What is the equation that links kinetic energy, mass and velocity?
kinetic energy = 0.5 x mass x (velocity)2 Ek=0.5 x m x v2
What is the equation that links gravitational potential energy, mass, gravitational field strength and height?
gravitational potential energy = mass x gravitational field strength x height Ep = m x g x h
What is the equation that links power, energy transferred and time?
power = energy transferred / time P = E ÷ t
What is the equation that links power, work done and time?
power = work done / time P = W ÷ t
What is the equation that links efficiency, useful energy transfer and total input energy transfer?
Efficiency = useful output energy ÷ total energy input
What is the equation that links efficiency, useful power output and total power input?
efficiency = total power output ÷ total power input
What is the equation that links wave speed, frequency and wavelength?
wave speed = frequency x wavelength v = f x λ
What is the equation that links charge flow, current and time?
charge flow = current x time Q = I x t
What is the equation that links potential difference, current and resistance?
potential difference = current x resistance V = I x R
What is the equation that links power, potential difference and current?
Power = potential difference x current P = V x I
What is the equation that links power, current and resistance?
Power = (current)2 x resistance P = I2 x R
What is the equation that links energy transferred, power and time?
energy transferred = power x time E = P x t
What is the equation that links energy transferred, charge flow and potential difference?
energy transferred = charge flow x potential difference E = Q x V
What is the equation that links density, mass and volume?
density = mass ÷ volume (p = m ÷ v)
What is the unit of weight?
Newtons (N)
What is the unit of mass?
kilograms (kg)
What is the unit of gravitational field strength?
Newtons per kilogram (N/kg)
What is the unit of work done?
Joules (J)
What is the unit of force?
Newtons (N)
What is the unit of distance?
metres (m)
What is the unit of velocity?
metres per second (m/s)
What is the unit of time?
seconds (s)
What is the unit of acceleration?
metres per second2 (m/s2)
What is the unit of momentum?
Nm/s
What is the unit of kinetic energy?
Joules (J)
What is the unit of gravitational energy?
Joules (J)
What is the unit of height?
metres (m)
What is the unit of power?
Watts (W)
What is the unit of wave speed?
metres per second (m/s)
What is the unit of frequency?
Hertz (Hz)
What is the unit of wavelength?
metres (m)
What is the unit of charge flow?
Coulombs (C)
What is the unit of current?
Amperes (A)
What is the unit of potential difference?
Volts (V)
What is the unit of resistance?
Ohms (Ω)
What is the unit of density?
kilograms per metre3 (kg/m3)
