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Forces by Mind Map: Forces
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has magnitude

has direction

Can add to find the net force



Ideal Pulleys

has no mass and no friction

Fundamental Forces

Gravitational, Newton's Fourth Law, g=9.8N/kg, Weakness of the fundamental forces, Why planets orbit around the sun

Weak, Even shorter the Strong force, Radioactive decay process

Strong, Holds protons and neutrons together, Strongest Fundamental force, Negligible at distances much larger then the size of atomic nuclues

ELectromagnetic, Unlimited in range, Fundamental interaction that binds atoms together


Normal, Perpendicular

Friction, Static, proportional to the magnitude of the normal force acting between 2 forces, Kinetic, proportional to the normal force and the independent speed

Newtons Laws

Newton's First Law

Interia, reisitance to changes in velocity

An object's velocity doesn't change if and only if the net force on the object is zero

Newton's Third Law

Forces are equal and opposite

Newton's Fourth Law

Universal Gravitation, F=(Gm1m2)/r*2, attractive force, proportional to masses of the objects

Newton's Second Law


Force vector = mass scalar time acceration vector

Free-Body Diagram

Shows all the forces acting on an object