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Newton's Laws
 1) Law of Inertia
 2) F = ma
 3) For every action there is an equal and opposite reaction

The law of Universal Gravitation
 F = G (m_{1}m_{2}/r^{2})
 G = 6.67*10^{11} m^{3}/kg/s




Circular Motion: Acceleration and Force
 a_{c} = v^{2 }/ r
 F_{c} = (mv^{2}) / r
 * whenever F_{c} exists some other force is responsible for it

Normal Force for Inclined Planes
F_{n} = mg cosθ

Solving for F_{n} on a curved surface
 F_{n} = mg cosθ + F_{c}
 F_{c} = (mv^{2}) / r

Tension
tension is constant throughout the rope


