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Unformatted text preview: F G F G F N F N Accelerating Down Accelerating Up Constant Still T T 2T T T FBD on pulley system (which is massless/frictionless) FBD on weight/man mg mg T T 8 kg g T A T C B 8 kg g 6 kg g 10 kg g T A T C C A 09-29-2009 171.101, General Physics for Physical Science Majors I Aside from P. Henry: Friction created by irregular intermolecular forces between object and surface. Newtons Second Law of Motion: F = ma, so a = F/m e.g. Weight on fan slows it down: Greater mass, same force, lower acceleration. Look on page 17 of Book: Schrodinger Equation---real measure of mass/acceleration of a particle. Types of Force F m a SI Units N kg m/s 2 cgs dyne g cm/s 2 Clicker Question: The force the man exerts on the Earth is equal to the force that the Earth exerts on the man and vice versa: Newtons Third Law: For every force there is an equal and opposite reaction. Mass: resistance to acceleration Weight: the FORCE needed to support the body against gravity Normal Force: electromagnetic force exerted on the object by the surface (the normal force is always...
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This note was uploaded on 10/01/2009 for the course DOGEE 171.101 taught by Professor Henry during the Fall '09 term at Johns Hopkins.
- Fall '09