Newton’s 1st Law

This law is also known as the Law of Inertia.

It states that if the sum of all the forces acting on an object equal zero ΣF=0 (if everything cancels out), then the object will move with a constant velocity. So, and object at rest will stay at rest, and an object in motion will stay in motion moving with a constant velocity.

Newton’s 2nd Law

This states that an applied force, , on an object equals the mass, m, of an object times its acceleration, a. This is the most fundamental of Newton’s Laws. Simply stated, the net force on an object is equal to the mass of the object multiplied by its acceleration. This is for a constant mass.

Newton’s 3rd Law

The Third Law means that all forces are interactions, and thus that there is no such thing as a unidirectional force. If body A exerts a force on body B, simultaneously, body B exerts a force of the same magnitude body A, both forces acting along the same line.

”To every action there is always an equal and opposite reaction: or the forces of two bodies on each other are always equal and are directed in opposite directions”.

Remember:

Net Force: The sum of all forces acting on an object. Even if net force is zero, there can still be forces acting on an object, they just cancel each other out. Represented by ΣF

Velocity: The change in position of an object in an amount of time. Usually shown in meters per second. V=Δx/ΔT

Acceleration: The change in velocity over a period of time. a=ΔV/ΔT