Year 10 Physics

Speed formula

v = d ÷ t (Speed = Distance ÷ Time)

Distance formula

d = v × t (Distance = Speed × Time)

Time formula

t = d ÷ v (Time = Distance ÷ Speed)

Acceleration formula

a = (vf - vi) ÷ t (Acceleration = Change in velocity ÷ Time)

Force formula

F = m × a (Force = Mass × Acceleration)

Mass formula

m = F ÷ a (Mass = Force ÷ Acceleration)

Newton’s First Law

An object stays at rest or in uniform motion unless acted on by a force (Law of Inertia)

Example of Newton’s First Law

A book stays still on a table until someone pushes it

Newton’s Second Law

Force = Mass × Acceleration; the greater the force

Example of Newton’s Second Law

A heavier cart needs more force to push than a lighter one

Newton’s Third Law

For every action

Example of Newton’s Third Law

Jumping off a boat pushes the boat backward

Convert m/s to km/h

Multiply by 3.6 (e.g.

Convert km/h to m/s

Divide by 3.6 (e.g.

Acceleration from graph

Acceleration = Slope of velocity-time graph = Change in velocity ÷ Time

Flat line on velocity-time graph

Constant velocity (no acceleration)

Upward slope on velocity-time graph

Acceleration (speeding up)

Downward slope on velocity-time graph

Deceleration (slowing down)