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Atwood Machine and Newton’s 2nd Law
An Atwood Machine is a very simple device invented by George Atwood in 1794 as a way to demonstrate Newton’s Laws of Motion. Newton’s Second Law of Motion says that the force required to move something equals the object’s mass times it’s rate of acceleration: F = ma. When Earth’s gravity is the force, you use 9.8 m/s2 for a. This is gravitational acceleration, the rate at which gravity pulls everything towards the center of the Earth.
You can rewrite Newton’s Second Law to solve for acceleration by dividing both sides by m: a = F / m.Acceleration is just what happens when you push on a mass, m, with a force, F.
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