C H A P T E R 5 Dynamics of Uniform Circular Motion

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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 cosq = 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.

Artificial Gravity

5.7 Vertical Circular Motion