unit 2: dynamics

Newton’s 1st Law of Motion:

Newton’s 1st Law of Motion:

An object will move w/h a constant velocity (remain at rest) unless acted upon by another force

Newton’s 2nd Law of Motion:

If a net force is applied to an object, it causes an acceleration equal to the force divided by the mass. In other words, acceleration = force/mass or force = mass x acceleration

Newton’s 3rd Law of Motion:

Forces are always interactions between two objects where they exert equal and opposite forces on each other

Inertia

The tendency of an object to keep on doing what it is doing, also the resistance to change in motion (mass)

Force

A push or pull applied to an object, measured in newtons (n)

Net force

Vector sum of all forces acting on an object (ΣF or Fnet, F should have a small right arrow above it)

If two people push on the same object with the same amount of force, but in opposite directions, what is the net force?

It is zero because

Mass

Quantifies inertia and describes how easy or difficult it is to accelerate an object, measured in kilograms (kg)