Linear Motion

Displacement

Definition: Change in position between initial and final points.

SI unit: meters (m)

Formula: comparing final vs initial

Graph: Represented by position time graphs. Steeper slope indicates faster movement.

Velocity

Definition: Rate of change of displacement.

SI Unit: Meters per second (m/s)

Formula

acceleration

Definition: Rate of change of velocity.

SI Unit: Meters per second squared (m/s²)

Formulae

v = change of speed / change of time (Average velocity)

v = u + at (velocity with constant acceleration)

Graphs

Area under the graph: Represents total displacement (since v = ds/dt)

Gradient:
Represents acceleration (since a = dv/dt).

a = Δv / Δt
(average acceleration)

a = (v - u) / t
(acceleration with constant initial and final velocities)