Tuesday
May 21, 2013

# Posts by sierra

Total # Posts: 178

Physics
Speed of a satellite orbit (physics problem)? What is the speed of a satellite in a geosynchronous orbit about Earth? _________m/s Compare it with the speed of the Earth as it orbits the Sun. _________m/s

Physics
In recent years, a number of nearby stars have been found to possess planets. Suppose, the orbital radius of such a planet is found to be 3.0 1011 m, with a period of 1000 days. Find the mass of the star.

Physics
Saturn makes one complete orbit of the Sun every 29.4 years. Calculate the radius of the orbit of Saturn. Hint: It is a very good approximation to assume this orbit is circular.

Physics
A stone of mass 0.31 kg is tied to a string of length 0.65 m and is swung in a horizontal circle with speed v. The string has a breaking-point force of 70 N. What is the largest value v can have without the string breaking?

Physics
Consider points on the Earth's surface as sketched in the figure below. Because of the Earth's rotation, these points undergo uniform circular motion. Compute the centripetal acceleration at the following points.

Physics
Suppose the circular track in the figure below has a radius of 104 m and the runner has a speed of 3.3 m/s.

Physics
Suppose the circular track in the figure below has a radius of 104 m and the runner has a speed of 3.3 m/s.

Physics
A jogger is running around a circular track of circumference 480 m. If the jogger has a speed of 11 km/h, what is the magnitude of the centripetal acceleration of the jogger?

Physics
Mars has two moons, Phobos and Deimos. It is known that the larger moon, Phobos, has an orbital radius of 9.4 106 m and a mass of 1.1 1016 kg. Find its orbital period.

Physics
Uranus makes one complete orbit of the Sun every 83.8 years. Calculate the radius of the orbit of Uranus. Hint: It is a very good approximation to assume this orbit is circular.

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