Required Equations GCSE

Question 1

weight

Answer 1

weight = mass x gravitational field strength
W = mg
N = kg x N/kg

Question 2

work done

Answer 2

work done = force x distance
W = Fd
J = N x m

Question 3

elastic potential

Answer 3

elastic potential = 1/2 x spring constant x extension²
E_e = 1/2 ke²
J = N/m x m

Question 4

speed

Answer 4

speed = distance / time
s = d/t
m/s = m / s

Question 5

uncertainty

Answer 5

uncertainty = 1/2 x range
mean ± uncertainty

Question 6

kinetic energy

Answer 6

kinetic energy = 1/2 x mass x velocity²
E_k = 1/2 mv²
J = kg x m/s

Question 7

gravitational potential energy (GPE)

Answer 7

GPE = mass x GFS x height
E_p = mgh
J = kg x n/kg x m

Question 8

formula power using energy

Answer 8

power = joules / time
P = E / t
W = J / s