Newton's First Law (Law of Inertia)

A body continues in its state of rest or uniform motion in a straight line unless acted upon by an external force.

Newton's Second Law

F = ma (Force = mass × acceleration)

Newton's Third Law

For every action, there is an equal and opposite reaction.

Important Formulae

• F = dp/dt (rate of change of momentum)
• Impulse = F × t = change in momentum
• Friction: f = μN