Dynamics of Circular Motion: Satellites, Gravity, and More
Explore the dynamics of uniform circular motion, from banked curves to satellite orbits and artificial gravity. Learn about the orbital speed of the Hubble Space Telescope, GPS technology, synchronous satellites, apparent weightlessness, and vertical circular motion in this informative content.
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Presentation Transcript
C H A P T E R 5 Dynamics of Uniform Circular Motion
5.4 Banked Curves Q: Why exit ramps in highways are banked? A: To increase the centripetal force for the higher exit speed. FN cos = mg
5.5 Satellites in Circular Orbits
Orbital Speed of the Hubble Space Telescope Determine the speed of the Hubble Space Telescope orbiting at a height of 598 km above the earth s surface.
Global Positioning System (GPS) A network of 24 satellites, which can be used to determine the position of an object to within 15 m or less.
Synchronous Satellites These satellites move around their orbits in a way that is synchronized with the rotation of the earth. A synchronous satellite orbits the earth once per day on a circular path that lies in the plane of the equator. Digital satellite system television uses such satellites as relay stations for TV signals.
5.6 Apparent Weightlessness Figure 5.18 shows a person on a scale in a freely falling elevator and in a satellite in a circular orbit. In each case, what apparent weight is recorded by the scale? Answer: 0
As she orbits the earth, this NASA astronaut floats around in a state of apparent weightlessness.
