anthony morris
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# Laws of Motion

1. Every object will stay in a state of rest or motion unless an outside force acts on it
• The motion will have a constant speed
• Restatement of Galileo's discovery of the conservation of momentum
• Sometimes called the law of inertia
2. Change of motion of a body is proportional to and in the direction of the force acting on it
• $F = ma$
• If you want to accelerate anything, you have to apply a force
3. For every action there is an equal and opposite reaction
• Mutual actions of two bodies upon each other are always equal and act in opposite directions

Physics