ALL FORMULAS

Question 1

Speed (v)

m/s

Answer 1

Distance / Time

d/t

Question 2

Velocity (v)

m/s

Answer 2

Displacement / Time

d/t

Question 3

Acceleration (a)

m/s²

Answer 3

Change in velocity / Change in time

final velocity - initial velocity / time taken

Δt
Δv

Question 4

Weight (W)

N (newtons)

Answer 4

Mass x Gravitational field strength

grav field strength will usually be 9.8/10 exam will tell which to use

m x g

Question 5

Force (F)

N (newtons)

Answer 5

Mass x acceleration

m x a

Question 6

Density (ρ)

kg/m³

Answer 6

Mass / Volume

m/v

Question 7

Hooke’s Law (HL / SF)

N (newtons)

Answer 7

Spring constant x extension

F = kx

Question 8

Pressure (P)

Pa

Answer 8

Force / Area

F/a

Question 9

Work Done (Wd)

J (joules)

Answer 9

Force x Distance

F x d

Question 10

Power (P)

W (watts)

Answer 10

Work / Time OR Energy / Time

Wd/t OR E/t

Question 11

Energy (E)

J (joules)

when given v & Q

Answer 11

Voltage× Charge

V x Q

Question 12

Kinetic Energy (KE)

J (joules)

Answer 12

1/2 x mass x velocity²

1/2mv²

Question 13

Gravitational Potential Energy (gpe)

J (joules)

Answer 13

mass x grav x height

m x g x h

Question 14

Efficiency (%)

Answer 14

Useful energy output / Total energy input

x 100

Question 15

Moment (M)

Nm (newton meters)

Answer 15

Force x Distance

F x d

Question 16

Impulse (I)

Ns (newton seconds)

Answer 16

Force x Time

F x t

Question 17

Momentum (p)

kg·m/s

Answer 17

Mass x Velocity

m x v

Question 18

Wave Speed (v)

m/s

Answer 18

Frequency x Wavelength

f × λ

Question 19

Refractive Index (n)

Answer 19

sin(i)/sin(r)​

Question 20

Snell’s Law

Answer 20

n₁sin(θ₁) = n₂sin(θ₂)

Question 21

Electric Current (I)

(A) amperes

Answer 21

Voltage / Resistance OR Charge / time

V /R OR Q / t

Question 22

Voltage (V)

(V) volts

Answer 22

Current x Resistance

I x R

Question 23

Resistance (R)

Ω (Ohms)

Answer 23

Voltage / Current

V / I

Question 24

Power (P)

W (Watts)

equation in a circuit

Answer 24

Current x Voltage OR Current² x Resistance

I x V OR Q² x R

Question 25

Energy Transferred (E) | J (Joules)

Answer 25

Current x Voltage x Time OR Power x Time | Q x V x t OR P x t

Question 26

Resistors in Series | Ω

Answer 26

RTotal = R₁ + R₂ + ...

Question 27

Resistors in Parallel

Answer 27

1/RTotal = 1/R₁ + 1/R₂ + ...

Question 28

Transformer Equation

Answer 28

Vp/Vs = Np/Ns | Vp x Ip = Vs x Is

Question 29

Energy-Mass Equivalence

Answer 29

Mass x Speed of light | m x 3 x 10^8

Question 30

Orbital Speed (v) | m/s

Answer 30

2 x π x r / Time period | time period in seconds so convert even if it's in years ## Footnote yes they do that yes I know it's evil