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Chapter 2-Forces
by Melissa Schultz
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Chapter 2-Forces

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Vectors

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magnitude and direction

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can be used to find net force

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Examples: weight, velocity, force

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measured using two methods

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arrows drawn tip to tail

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Measurements

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Newtons = kg * m/s^2

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Weight = mass * gravitational field strength

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mass = kg

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

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Newton's Laws

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

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2. Force vector = mass scalar * acceleration vector

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

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Field Forces

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Gravitational

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Electromagnetic

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Strong

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Weak

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Contact Forces

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Normal

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Friction

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Tension

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Free Body Diagrams: show all forces on object

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can be drawn and measured using vectors

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Lab

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Distance and time

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Velocity and time

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Blogs

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Hurricane forces

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Earthquake forces

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