# 03. Physics Equations Flashcards

Weight

W

Weight = mass x gravitational field strength

W = m x g

Work done

W

Work Done = force x distance (along line of action)

W = F x s

Force applied to a spring

F

Force applied to a spring = spring constant x extension

F = k x e

(Physics Only) Moment of a force

Moment = force x distance

M = F x d

(Physics Only) Pressure

P

Pressure = force normal to a surface / area of that surface

P = F / A

Distance travelled

s

Distance = speed x time

s = v x t

Force

F

Force = mass x acceleration

F = m x a

Acceleration

a

Acceleration = change in velocity / time taken

a = Δv / t

Momentum

p

Momentum = mass x velocity

p = m x v

Kinetic energy

E_{k}

Kinetic Energy = 1/2 x mass x (velocity)^{2}

E_{k }= 1/2 x m x v^{2}

Gravitational potential energy

E_{p}

Gravitational Potential Energy = mass x gravitational field strength x height

E_{p} = m x g x h

Power

P

Power = energy transferred / time

P = E / t

Power

P

Power = work done / time

P = W / t

Power

P

Power = potential difference x current

P = I x V

Power

P

Power = current^{2} x resistance

P = I^{2} x R