Physics GCSE Equations

Question 1

Kinetic Energy =

(Equation that links kinetic energy, mass and speed)

Answer 1

Ek = 0.5 x mass x (speed)²

Ek = ½ m v²

Question 2

Elastic Potential Energy =

(Equation that links elastic potential, spring constant and extension )

Answer 2

0.5 x spring constant x (extension)²

Ee = ½ x k x e²

Question 3

Gravitational Potential Energy =

(Equation that links gravitational potential, mass, gravity and height )

Answer 3

mass x gravity x height

Ep = m x g x h

Question 4

Change In Thermal Energy =

(Equation that links thermal energy, mass , specific heat capacity and temperature change )

Answer 4

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

E = m x c x △0

Question 5

Power =

(Equation that links power , energy transferred and time )

Answer 5

power = energy transferred / time

P= E/t

Question 6

Power =

(Equation that links power, work done and time )

Answer 6

Power = work done/ time

P = W/t

Question 7

Efficiency =

(Equation that links efficiency, output and input energy transfer)

Answer 7

useful output energy transfer/ total input energy transfer

Question 8

Efficiency =

(Equation that links efficiency, power output and input)

Answer 8

useful power output/ total power input

Question 9

Potential difference =

(Equation that links potential difference, current , and resistance)

Answer 9

Current x resistance

V= I R

Question 9

Charge flow =

(Equation that links charge flow, current, and time)

Answer 9

current x time

Q = I t

Question 10

Power =

(Equation that links power, potential difference and current)

Answer 10

Potential difference x current

P= V I

Question 11

Power =

(Equation that links power, current and resistance)

Answer 11

(Current)² x resistance

P = I² R

Question 12

Energy transferred =

(Equation that links energy, power and time)

Answer 12

Power x time

E = P t

Question 13

Energy transferred =

(Equation that links energy, charge flow and difference)

Answer 13

Charge flow x potential difference

E = Q V

Question 14

Density =
(Equation that links density, mass and volume)

Answer 14

Mass/Volume

p= m/V

Question 15

Thermal energy for a change of state =

(Equation that links thermal energy, mass and specific latent heat )

Answer 15

mass x specific latent heat

E = mL

Question 16

For gases =

(Equation that links gases, pressure and volume)

Answer 16

pressure x volume = constant

p V = constant

Question 17

Weight =

(Equation that links weight, mass and gravity)

Answer 17

Mass x gravitational field strength

Question 18

Work done =

(Equation that links work done, force and distance)

Answer 18

Force x distance (along the line of action of the force)

W = F s

Question 19

Force =

(Equation that links force, spring constant and extension)

Answer 19

Spring constant x extension

F = k e

Question 20

Moment of a force =

(Equation that links moment, force and distance)

Answer 20

Force x distance (normal to direction of force)

M= F d

Question 21

Pressure =

(Equation that links pressure, force and area )

Answer 21

force normal to a surface/ area of that surface

p = F/A

Question 22

HIGHER TIER ONLY

Pressure due to a column of liquid =

(Equation that links pressure, height, density and gravity)

Answer 22

Height of column x density of liquid x gravitational field strength

p = h p g

Question 23

Distance travelled =

(Equation that links distance, speed and time)

Answer 23

Speed x time

s=v t

Question 24

Acceleration =

(Equation that links acceleration, velocity and time)

Answer 24

Change in velocity/ time taken

a = △v/t

Question 25

(final velocity)² - (initial velocity)²

(Equation that links velocity, acceleration and distance)

Answer 25

2 x acceleration x distance

v² - u² = 2 a s

Question 26

Resultant force =

(Equation that links force, mass and acceleration)

Answer 26

Mass x acceleration

F= m a

Question 27

HIGHER TIER ONLY

Momentum =

(Equation that links momentum, mass and velocity)

Answer 27

Mass x velocity

p = m v

Question 28

HIGHER TIER ONLY

Force =

(Equation that links force, momentum and time)

Answer 28

Change in momentum/ time taken

F = m △v/ △t

Question 29

Period =

(Equation that links period and frequency)

Answer 29

1/ frequency

T = 1/f

Question 30

Wave speed =

(Equation that links speed, frequency and wavelength)

Answer 30

Frequency x wavelength

v = f λ

Question 31

Magnification =

(Equation that links magnification, image and object height)

Answer 31

image height/ object height

Question 32

HIGHER TIER ONLY

Force on a conductor (at a right angles to a magnetic field) carrying a current =

(Equation that links force, magnetic flux density, current and length)

Answer 32

Magnetic flux density x current x length

F = B I L

Question 33

HIGHER TIER ONLY

Potential difference across primary coil/ potential difference across secondary coil =

(Equation that links potential diff. , no. of turns on a coil)

Answer 33

Number of turns in primary coil / number turns in secondary coil

Vρ/ Vs = nρ/ ns

Question 34

HIGHER TIER ONLY

Potential difference across primary coil x current in primary coil =

(Equation that links potential diff. , potential diff. on coils)

Answer 34

Potential difference across secondary coil x current in secondary coil

Vρ Iρ = Vs Is