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Unit 3 - Gravity and Force (Definitions (Force (A push or pull from any…
Unit 3 - Gravity and Force
Definitions
Force
A push or pull from any given object
Electromagnet
A type of magnet created with an magnetic force produced by an electrical current
Gravity
A force that causes every object in the universe to be attracted to every other object in the universe
Galaxy
A collection of stars, their associated systems of objects, gas and dust
Solar System
A collection of bodies, including the sun (a star), planets, moons and asteroids.
Planet
A round rocky or gaseous object that orbits a sun
Meteoroids \ Meteors
Small rocky objects that orbit the sun
Small parts of broken asteroids
When a meteoroid comes closer to Earth it becomes a meteor
Asteroids
A small rocky body orbiting the sun
Comet
An icy body that releases gas or dust
Also known as a Dirty Snowball or a Snowy Dirtball
Equations
Galaxies
Distance and Gravity
Doubling the distance between objects reduces the gravity by a quarter (1/4)
Mass and Gravity
Doubling the mass of an object doubles the gravitational pull exerted
Force
F = M x A - Force equals Mass times Acceleration
M = F \ A - Mass equals Force divided by Acceleration
A = F \ M - Acceleration equals Force divided by Mass
Acceleration
A = V \ T - Acceleration equals Velocity divided by Time
V = A x T - Velocity equals Acceleration multiplied by Time
T = V \ A - Time equals Velocity divided by Acceleration
Distance
D = V x T - Distance equals Velocity multiplied by Time
V = D \ T - Velocity equals Distance divided by Time
T = D \ V - Time equals Distance divided by Velocity
Newton' Three Laws of Physics
Newton's Second Law
The more mass, the more force it takes to move (act upon) an object
Newton's Third Law
Every action has an equal and opposite reaction.
Newton's First Law
An object in motion will stay in motion, unless acted on by another force.
Units
Mass = kg
Force = Newtons (N)
Acceleration = m\s(exponent 2)
Velocity = m\s