IGCSE Equations and Units review

How mass is related to weight

• F_w=mg

• w=pm

• P=W/m

• g=F_wm

Hooke's Law

• F=kx

• k=Fx

• x=Fk

• F=ma

SI unit for power

• Watt

• What

• When

• Who

How change in momentum is shown with algebra

• mv-mu

• m(v+u)

• mv=mu

• F/t

Equation defining acceleration

• velocity/time

• Δv÷Δt

• v÷t

• vt

Displacement is equal to

• velocity x time

• speed x time

• distance

• v/t

Kinetic energy equation

• 1/2mv²

• mgh

• 1/2mv

• mgΔh

Momentum equation

• mass x velocity

• mass ÷ velocity

• mass x acceleration

• mass ÷ speed

The resultant force equation

• F_net=ma

• F-ma=0

• F=ma

• F=mg

The units for momentum

• kgms^-1

• kgms

• kgms^-2

• N