L19 - Remember:ThisWeek...

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Remember: This Week Read Ch. 5 on circular mo8on & gravity: 5.1, 5.2, 5.6, 5.7, 5.±, 5.9. Recita’on Assignment #4 : Circular Mo8on & Gravity. Print assignment out and bring to recita8on sec8on. CAPA assignment #7 is due Friday evening at 10 PM, to be done on‐line. Mid‐Term Exam II: next Tuesday at 7:30 PM here and next door. Last half of Ch. 3, Ch. 4, & Ch. 5. L19 W 2/24/10 1 Physics 2010
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L19 W 2/24/10 Physics 2010 2 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 ±rst: F  net = ma F AB = F BA
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L19 W 2/24/10 Physics 2010 3 Ch. 5: Circular Motion; Gravitation Sections: 5-1. Kinematics of Uniform Circular Motion 5-2. Dynamics of Uniform Circular Motion 5-6. Newton’s Law of Universal Gravitation 5-7. Gravity Near Earth’s Surface 5-8. Satellites and “Weightlessness” 5-9. Kepler’s Laws and Newton’s Synthesis.
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L19 W 2/24/10 Physics 2010 4 Example 2. Conical Pendulum (tetherball). θ r r = v 2 g 1 2 1 + 2 Lg v 2 2 1 2 1/2 v (m/s) v (m/s) L = 2m r v r constant L 2 r 2 = h L
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L18 M 2/22/10 Physics 2010 5 Newton’s Law of Universal Gravitation Insight: what keeps the Moon in orbit around the Earth and the Earth in orbit around the Sun is exactly the same thing that causes an “apple to fall from a tree”.
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This note was uploaded on 08/24/2010 for the course PHYS 2010 taught by Professor Dubson during the Spring '06 term at Colorado.

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L19 - Remember:ThisWeek...

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