Physics GCSE Formula

Formula for distance travelled

1. Distance travelled = average speed × time

2. d = s x t

Formula for acceleration

1. Acceleration = change in velocity ÷ time taken

2. a = (v-u) // t

Formula for force

1. Force = mass × acceleration

2. F = m x a

Formula for weight

1. Weight = mass × gravitational field strength

2. W = m x g

Formula for momentum

1. Momentum = mass × velocity

2. p = m x v

Formula for GPE

1. Change in gravitational potential energy = mass × gravitational field strength × change in vertical height

2. GPE = m x g x h

Formula for KE

1. Kinetic energy = 1/2 × mass × (speed)2

2. KE = 1/2(m)(v)2

Formula for efficiency

1. Useful energy transferred by the device // total energy supplied to the device * 100

Formula for wave speed, frequency, wavelength

1. Wave speed = frequency × wavelength

2. v = f × λ

Formula for wave speed, d, t

1. Wave speed = distance ÷ time

2. v = x / t

Formula for work done

1. Work done = force × distance moved in the direction of the force

2. WD = f x d

Formula for power (WD and t)

1. Power = work done ÷ time taken

2. P = WD / t

Formula for energy transferred

1. Energy transferred = charge moved × potential difference

2. E = Q x V

Formula for charge

1. Charge = current × time

2. Q = I x t

Formula for potential difference

1. Potential difference = current × resistance

2. V = I x R

Formula for power(energy, time)

1. Power = energy transferred ÷ time taken

2. P = E / t

Formula for electrical power

1. Electrical power = current × potential difference

2. P = I x V

Formula for electrical power(resistance)

1. Electrical power = (current)2 × resistance

2. P = (I)2 x R

Formula for density

1. Density = mass ÷ volume

2. ρ = m / v

Formula for force exerted on a spring

1. Force exerted on a spring = spring constant × extension

2. F = k x e

Formula for final velocity, initial velocity, acceleration, distance

1. (final velocity)2 - (initial velocity)2 = 2 × acceleration × distance

2. v2 - u2 = 2(a)(x)

Formula for force(change in momentum and time)

1. Force = change in momentum ÷ time

2. F = (mv - mu) // t

3. Where m is mass

Formula for energy transferred(I,V,t)

1. Energy transferred = current × potential difference × time

2. E = I x V x t

Formula for force on a conductor at right angles to a magnetic field carrying a current

1. Force on a conductor at right angles to a magnetic field carrying a current = magnetic flux density × current × length

2. F = B X I x l

Formula for transformers

1. For transformers with 100% efficiency, potential difference across primary coil × current in primary coil = potential difference across secondary coil × current in secondary coil

2. VP × IP = VS × IS

Formula for change in thermal energy

1. Change in thermal energy = mass × specific heat capacity × change in temperature

2. ∆Q = m × c × ∆θ

Formula for thermal energy for a change of state

1. Thermal energy for a change of state = mass × specific latent heat

2. Q = m × L

Formula for energy transferred in stretching

1. Energy transferred in stretching = 0.5 × spring constant × (extension)

2. E = 1/2(k)(e)2

Formula for moment of a force

1. Moment of a force = force × distance normal to the direction of the force

2. M = F x d

Formula for pressure

1. Pressure = force normal to surface ÷ area of surface

2. P = F / a

Formula regarding number of turns and voltage

VP/VS is equal to NP/NS

Formula to calculate pressure or volume for gases of fixed mass at constant temperature

P1 × V1 = P2 × V2

Formula for pressure due to a column of liquid

1. Pressure due to a column of liquid = height of column × density of liquid × gravitational field strength

2. P = h × ρ × g