Physics I Lab Manual 2011 37

# Physics I Lab Manual 2011 37 - Experiment 4 Newton’s Laws...

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Unformatted text preview: Experiment 4 Newton’s Laws Objective To demonstrate and conﬁrm Newton’s 3 laws of motion and to test the equivalence principle relating inertial mass to gravitational mass. Theory The ﬁeld of Classical Mechanics is based on Newton’s 3 laws of motion, that can be summarized as follows: 1. An object at rest will remain at rest unless acted on by a net force, and an object in motion will continue in motion with constant velocity unless acted on by a net force. 2. The net force on an object is equal to the time rate of change of its momentum. (i.e. F = ma for an object with constant mass). 3. For every action (Force) there is an equal and opposite reaction. Newton’s ﬁrst law is really just a speciﬁc case of his second law. Newton’s second law states that the net force on an object equals its mass times its acceleration. With this relationship 27 ...
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