Summary – to this point
Definitions: displacement, velocity, acceleration, momentum are vectors that describe motion
Newton’s three laws:
- 1. A body moves with constant velocity unless acted upon by a force -- equivalent to principle of inertia
- 2. F=ma
- 3. Equal and opposite forces -- action/reaction (equivalent to conservation of momentum – more later)
Concept of Force, Mass
- Mass is a scalar measure of “inertia” or resistance to acceleration”
- Force is a vector - tends to cause acceleration
- The force in Newton’s equation is the “Net Force” -- the vector sum of all forces on a body