GCSE formulae

Question 1

Wavespeed equation

Answer 1

Wavespeed (v) = frequency (f) x wavelength (lambda)

Question 2

Time period equation

Answer 2

Time period (T) = 1/ frequency (f)

Question 3

Frequency equation

Answer 3

Frequency (f) = 1/Time period (T)

Question 4

Speed equation

Answer 4

Speed (s) = distance (d) / time (t)

Question 5

Displacement equation

Answer 5

Displacement (s) = velocity (v) x time (t)

Question 6

Average velocity equation

Answer 6

Average velocity (v(av)) = initial velocity (u) + final velocity (v)/ 2

Question 7

Change in velocity equation

Answer 7

Change in velocity (delta v) = final velocity (v) - initial velocity (u)

Question 8

Acceleration equation

Answer 8

Acceleration (a) = final velocity (v) - initial velocity (u) / time (t)

Question 9

Stopping distance equation

Answer 9

Stopping distance (dstopping) = thinking distance (dthinking) + braking distance (dbraking)

Question 10

Energy transferred equation

Answer 10

Energy transferred = work done = power x time

Question 11

Efficiency equation (POWER VERSION)

Answer 11

Efficiency = power (P) useful out / power (P) total in x 100%

Question 12

Efficiency equation (energy version)

Answer 12

Efficiency = energy (E) useful out / energy (E) total in x 100%

Question 13

Change in gravitational potential energy equation

Answer 13

Change in gravitational pot. energy = mass x grav field strength x change in height