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# L15 - L15M Physics2010 1 Remember:ThisWeek...

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L15 M 2/15/10 Physics 2010 1

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Remember: This Week Read Ch. 4 on Newton’s Laws & applicaFons. Begin Ch. 5 on circular moFon. Lab 2 this week : “AcceleraFon due to gravity”. Do Pre‐Lab on‐line, print and bring to lab sesssion, then print Lab 2 and bring that to lab session. CAPA assignment #6 is due Friday evening at 10 PM, to be done on‐line. L15 M 2/15/10 2 Physics 2010
L15 M 2/15/10 Physics 2010 3 Dynamics: Newton’s Laws of Motion Newton’s Laws hold in an “Inertial Reference Frame”. I. “Law of Inertia”: Every object continues in its state of rest, or uniform motion (constant velocity in a straight line), as long as no net force acts on it. II. Acceleration is proportional to force and inversely proportional to mass : III.Whenever one object exerts a force on a second object, the second exerts an equal force in the opposite direction on the first: F  net = ma F  AB = F  BA

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L15 M 2/15/10 Physics 2010 4 Dynamics: Newton’s Laws of Motion Applications: (1) Sliding Blocks. (2) Contact Forces. (3) Suspended Bodies. (4) Friction.
L14 F 2/12/10 Physics 2010 5 Prof. Mike Nerdly is standing stationary on a skateboard. Both his velocity and acceleration are zero. The net force acting on Prof. Nerdly is: B) Nonzero: UP C) Nonzero: DOWN D) Nonzero: LEFT E) Nonzero: RIGHT

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L14 F 2/12/10 Physics 2010 6 Prof. Mike Nerdly is standing stationary on a skateboard. He is traveling to the right with a constant velocity of 1 m/sec. The net force acting on Prof. Nerdly is: B) Nonzero: UP C) Nonzero: DOWN D) Nonzero: LEFT E) Nonzero: RIGHT v
L14 F 2/12/10 Physics 2010 7 Prof. Mike Nerdly is standing stationary on a skateboard. He is

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