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Forces (Energy (Kinetic (Energy of a moving object, Double mass = double…
Forces
Energy
Potential
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Elastic
Stored in objects that are compressed/stretched 
ex. 200 N/m spring constant displaced by 0.4m = 20J
Kinetic
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Double mass = double KE, Double speed = quadruple KE
ex. 100kg man moving at 1 m/s = 50J
Equations
PE(gravitational)=mgh
mg = weight, h = height
KE=1/2mv^2
m = mass, v = speed
PE(elastic)=1/2kx^2
k = spring constant, x = displacement
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Work
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Needed for potential and kinetic energy
Newton's Third Law
Opposite reaction
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Equal
ex. Box pushes back
Water Rocket Example: The force from the pressure pushing the water out pushes back on the rocket, making the rocket go up.
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Newton's First Law
Law of Inertia
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Water Rocket Example: An unbalanced force from the water pressure is exerted on the rocket, sending it flying. Then, gravity pulls it back down.
Newton's Second Law
F=ma
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Water Rocket Example: Our rocket is 181 grams, and it accelerated at 0 m/s^2. The force is 0. If it worked, and it accelerated at 30 m/s^2, then the force is 5430 Newtons.
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