OCR GSCE Physics Equations

speed =

speed = distance/time

s = d/t

acceleration =

change in velocity / time

a = v - u / t

weight =

mass x gravitational field strength

w = m x g

force =

mass x acceleration

f = m x a

efficiency =

(useful energy out / total energy in) x 100

momentum =

mass x velocity

p= m x v

wave speed =

frequency x wavelength

v = f x λ

density =

mass / volume

p = m / v

work done =

force x distance moved in direction of force

WD = F x d

change in gravitational potential energy =

mass x gravitational energy x height

△GPE = m x g x △h

kinetic energy =

1/2 x mass x (velocity)^2

KE = 1/2 x m x v^2

power (work done) =

work done / time

P = E / T

energy transferred =

charge moved x voltage

E = Q x V

charge =

current x time

Q = I x t

voltage (p.d.) =

current x resistance

OR energy / charge

V = I x R

OR V = E / Q

power (energy transferred) =

energy transferred / time

P = E / T

electrical power =

current x voltage

P = I x V

electrical power (resistance) =

current^2 x resistance

P = (I^2) x R

force on spring =

spring constant x extension

F = K x X

moment =

force x distance from pivot

M = F x D

pressure =

force / area

P = F / A

velocity (kinetic energy)

sqrt (2 x KE /mass)

stopping distance

thinking distance + braking distance

force (momentum)

change in momentum / time

unit of acceleration

m/s^2 (m/s/s)

unit of velocity

m/s (+ direction)

unit of gravitational field strength

newtons per kilogram (N/kg)

unit of momentum

kgm/s

force (change) =

change in momentum / time taken

specific latent heat formula

energy = mass x specific latent heat

Q = m x l

specific heat capacity formula

thermal energy = mass x specific heat capacity x change in temp

Q = m x c x Δθ

EM spectrum (descending)

gamma - x-ray - UV - visible - IR - microwave - radio

mechanical advantage (MA)

load / effort

weight of object on slope

weight x (height / length)

solar system order

Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune

star life cycle (small)

nebula → star → red giant → white dwarf (→ black dwarf)

star life cycle (big)

nebula → giant → super giant → neutron star OR black hole

newton's first law

object at rest stays at rest, object in motion stays in motion with same speed and same direction unless acted upon by an unbalanced force

newton's second law

(resultant) force = mass x acceleration

speed of sound

340 m/s

speed of light

3 x 10^8 m/s

1/2 x m x v^2 =

m x g x h

work done against friction when braking =

brake force x braking distance

resistors in parallel =

R1 X R2 / R1 + R2