equation for force and motion

Weight formula (W)

W = m x g (Weight = mass x gravitational field strength)

Mass formula (m)

m = W / g (Mass = Weight / gravitational field strength)

Gravitational field strength formula (g)

g = W / m (Gravitational field strength = Weight / mass)

Standard unit for Weight (W)

Newtons (N)

Standard unit for Mass (m)

Kilograms (kg)

Standard unit for Gravitational field strength (g)

Newtons per kilogram (N/kg)

acceleration definition

How quickly an object's velocity is changing (speeding up, slowing down, or changing direction).

acceleration formula (with time)

a = (v - u) / t [acceleration = (final velocity - initial velocity) / time]

uniform acceleration formula (no time)

v² - u² = 2 x a x x [final velocity² - initial velocity² = 2 x acceleration x distance]

standard unit for acceleration (a)

Metres per second squared (m/s²)

momentum definition

A measure of how difficult it is to stop a moving object, equal to mass multiplied by velocity.

momentum formula (p)

p = m x v [momentum = mass x velocity]

standard unit for momentum (p)

Kilogram metres per second (kg m/s)

force and momentum formula (F)

F = (mv - mu) / t [force = change in momentum / time taken]

conservation of momentum

The total momentum before a collision or explosion is equal to the total momentum after.