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powerpoint ch. 3

sections 1-3

QuestionAnswer
What happens to a ball at rest in the middle of a flat field? It is in equilibrium.
Who was the Greek scientist who was around in the 4th century B.C.? Aristotle
What were the two kinds of motion he studied? natural motion and violent motion
What are the two kinds of natural motion? straight up and down motion and circular motion
Who was the polish scientist who founded astronomy? Copernicus
What did Copernicus believe the Earth did? He believed the Earht revolved around the sun rather that vice versa.
Who was the Italien scientist who supported Copernicus? Galileo Galilei
What two things are a ball on a ramp affected by? gravity and speed
What is a combination of all forces action on an object? Net Force
What do the arrows show on the diagram? The vectors (direction and magnitude)
When applied forces act on the some direction what is the opperation? add the forces
When appplied forces act in opposite directions What is the opperation? subtract the forces
Created by: MSeise
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