lecture14_tth_2101_S11

lecture14_tth_2101_S11 - Spring 2011 A ball is thrown...

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PHYS 2101 I. Universal Law of Gravitation II. Shell Theorem III. Gravity near the Earth’s Surface IV. Gravitational Potential Energy V. Kepler’s Laws Spring 2011 F g = G m 1 m 2 r 12 2 ˆ r U g = - G m 1 m 2 r 12
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PHYS 2101 EX1: Four 2-kg particles are arranged in the x-y plane. Particle 1 located at (0.40, 0.30), particle 2 is 0.40 m away from the origin on the x-axis, and particle 3 is 0.30 m away from the origin on the y-axis. What is the gravitational force felt by particle 4, located at the origin? Spring 2011
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PHYS 2101 CT1: Rank the four arrangements shown below according to the net gravitational force acting on the particle labeled m, greatest magnitude first. D d m D d m D d m 1 2 3 4 D d m Spring 2011
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PHYS 2101 EX2: How far above the surface of the Earth does an object need to be to experience a gravitational acceleration of 90% of the value of g on the surface of the Earth? Spring 2011
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PHYS 2101 EX3: How far below the surface of the Earth does an object need to be to experience a gravitational acceleration of 90% of the value of g on the surface of the Earth?
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Unformatted text preview: Spring 2011 A ball is thrown vertically upward at 3.1 m/s. How high does it go? PHYS 2101 EX4 : A rocket is launched vertically upward at 3.1 km/s. How high does it go? Spring 2011 PHYS 2101 CT2: Rank the four arrangements shown below according to the gravitational potential energy of the particle labeled m, greatest magnitude first. D d m D d m D d m 1 2 3 4 D d m Spring 2011 PHYS 2101 CT3: Rank the four arrangements shown below according to the gravitational potential energy of the system of particles, greatest magnitude first. D d m D d m D d m 1 2 3 4 D d m Spring 2011 PHYS 2101 Spring 2011 PHYS 2101 Spring 2011 PHYS 2101 Spring 2011 PHYS 2101 EX4: S2 orbits Sagittarius A* with a period of T = 15.2 y (4.79 x 10 8 s) along an orbit with a semimajor axis of a = 5.50 light-days (1.42 x 10 14 m). What is the mass of Sagittarius A*? Spring 2011 PHYS 2101 Spring 2011 PHYS 2101 Spring 2011 PHYS 2101 Spring 2011...
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lecture14_tth_2101_S11 - Spring 2011 A ball is thrown...

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