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Last Modified: 2:01pm 10 Aug 11

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East Aurora Resident Images Artifacts at Boston Public Library

The People of CIS

Anthony Vodacek
Faculty

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Research Interests: Remote Sensing Integrating remote sensing and environmental models Data assimilation Dynamic Data Driven Applications Systems (DDDAS) Imaging spectroscopy Passive and active remote sensing of water quality Remote detection of wildland fire Feature extraction from hyperspectral data Fourier analysis of landscape metrics

Circular Motion

1. An Earth satellite moves in a circular orbit 640 km above Earth's surface with a period of 98.0 min. What are (a) the speed and (b) the magnitude of centripetal acceleration of the satellite?

2. A carnival merry-go-round rotates about a vertical axis at a constant rate. A passenger standing on the edge of the merry-go-round has a constant speed of 3.66 m/s. For each of the following situations, state how far the passenger is fro the center of the merry-go-round, and in what direction. (a) The passenger has an acceleration of 1.83 m/s^2, east. (b) The passenger has an acceleration of 1.83 m/s^2, south.

3. An astronaut is rotated in a horizontal centrifuge at a radius of 5.0 m. (a) What is the astronaut's speed if the centripetal acceleration has a magnitude of 7.0g? (b) How many revolutions per minute are required to produce this acceleration? (c) What is the period of the motion?

4. When a massive star become a supernova, its core may be compressed so tightly that it becomes a neutron star, with a radius of about 20 km (about the size of the San Francisco area). If a neutron star rotates once very second (a) what is the speed of a particle on the star's equator and (b) what is the magnitude of the particle's acceleration? (c) If the neutron star rotates faster, do the answers to (a) and (b) increase, decrease, or remain the same?