Newton's Laws of Motion

Newton's First Law

Object at rest will remain at rest and an object in motion will remain in motion unless acted upon by an outside force.

Inertia = tendency of an object to resist a change in motion

Net Force = sum of all forces acting on an object

Movement occurs when there is a net force acting on an object

Object remains at rest or remains at a constant velocity if net force = zero

Newton's Second Law

Acceleration depends on both force and mass

Force = mass * acceleration (F=ma)

Unbalanced forces cause acceleration of an object

As mass increases, acceleration decreases

As force increases, acceleration increases

Newton's Third Law

For every action, there is an equal and opposite reaction

Force may be equal but mass of objects determine the effect of force.

Action reaction forces are equal in strength but opposite in direction

Momentum - The result of mass of an object times the object's velocity

Action reaction forces can cause a change in motion, act on different objects, and cause an equal by opposite reaction