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Chapter 2-Forces by Mind Map: Chapter 2-Forces
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Chapter 2-Forces

Vectors

magnitude and direction

can be used to find net force

Examples: weight, velocity, force

measured using two methods

Polar method: descriptive, vector arrow with angle to horizontal

Step method: x hat and y hat, make triangle of x and y components, use SOH CAH TOA

arrows drawn tip to tail

Measurements

Newtons = kg * m/s^2

Weight = mass * gravitational field strength

mass = kg

average g (gravitational field strength) on earth = 9.80 N/kg

Newton's Laws

1. Inertia - object moves until forces change its movement, or at rest till forces move it

Equilibrium, moving at constant speed and direction, staying at rest

2. Force vector = mass scalar * acceleration vector

3. For every action, there is an equal and opposite reaction; within an interaction pair of 2 objects

Internal forces

External forces

Field Forces

Gravitational

Newton's Law: any two objects exert gravitational forces on each other that are related to distance and mass, F = G*m1*m2 / r^2, G = universal gravitational constant

Electromagnetic

Strong

Weak

Contact Forces

Normal

Friction

Kinetic

Static

Tension

ideal pulley or cord

typically studied in biomechanics

Free Body Diagrams: show all forces on object

can be drawn and measured using vectors

Lab

Distance and time

Velocity and time

Blogs

Hurricane forces

Earthquake forces