Monday
December 9, 2013

Posts by Sierra

Total # Posts: 185

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.

Physics
The region of the solar system between Mars and Jupiter contains many asteroids that orbit the Sun. Consider an asteroid in a circular orbit of radius 4.3 1011 m. Find the period of the orbit.

Physics
Find the gravitational force of the Sun on Jupiter.

Physics
The track near the top of your favorite roller coaster has a circular shape with a diameter of 36 m. When you are at the top, you feel as if you weigh only one-fifth of your weight on the ground. What is the speed of the roller coaster?

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