Equation List

Question 1

Acceleration Equation

Answer 1

v-u / t = a

Change in Velocity (m/s) / Time (s) = Acceleration (m/s2)

Question 2

Forces Equation

Answer 2

f=m x a

Force= Mass x Acceleration

Question 3

Momentum Equation

Answer 3

Δp = f x t

Change in Momentum = Force x Time

Question 4

Power Equation

Answer 4

W = P x t

Question 5

Hooke’s Law

Answer 5

F= k x e

Question 6

Weight and mass equation

Answer 6

W = m x g

Question 7

Wave Equation

Answer 7

v = f x λ

Velocity (m/s) = Frequency (Hz) x Wavelength (m)

Question 8

Speed Equation

Answer 8

s = d / t

Speed (m/s) = Distance (m) / Time (seconds)

Question 9

Efficiency (Energy)

Answer 9

Efficiency = useful energy in / useful energy out

(x 100%)

No Units

Question 10

Efficiency (Power)

Answer 10

Efficiency = useful power out / useful power in

x 100%

Question 11

Time period

Answer 11

T = 1 / f

Time (seconds) = 1 / frequency (Hz)

Relates to waves topic

Question 12

Moments

Answer 12

M (or ρ) = F x d

Moments (Nm) = Force (N) X (perpendicular) distance (m)

Question 13

Pressure equation

Answer 13

P = F / A

Pressure (N/m2 or N/cm2) = Force (N) / Area (m2 or cm2)

Question 14

Velocity Equation

Answer 14

V = s / t

Velocity (m/s) = displacement (m) / time taken (s)