Force - a push or pull one thing exerts on another
examples of force - gravity, magnetism, air, friction
Friction - the resistance that one surface or object encounters when moving over another
Fnet - the sum of all forces that act on an object
inertia - the momentum that is resistant to change in an object
equilibrium - where all forces acting on an object are balanced, resulting in no net force
mass vs. weight - mass is determined by the amount of matter an object has, and weight is determined by the amount of matter and the force of gravity acting upon it
Formulas
1 Newton = 1 kg x 1 m/s2
First Law of Motion - Fnet = 0
Second Law of Motion - Fnet= m x ā
weight of an object - Fg = mg
Newton’s Laws of Motion
if fnet=0, then the object is at rest or moving with a constant velocity and is at equilibrium
net force and acceleration are directly related
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Acceleration
acceleration is positive at all times during calculations
when acceleration is pointing downwards - Fr < Fg
when acceleration is pointing downwards - Fr > Fg
Normal Force
Normal force - a force exerted by the surface an object is on that is perpendicular to the surface
Normal force and the force of gravity cancel each other
Movement at an Incline
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