Anyone can solve physics question?

Posted on 2014-12-19 07:30:00 in Physics by ANDREW

1. A 0.013 kg rubber stopper is attached to a 0.93 m length of string. The stopper is swung in a
horizontal circle, making one revolution in 1.18 s.Find the angle the stopper makes with the
horizontal.

2. Find the ratio of the altitude of satellites that are in geosynchronus orbits to the altitude at
which the ISS which orbits every 92.81 minutes.

3. A circular space station is transporting settlers to Mars. It has two concentric rings connected with spokes,
with the outer ring having a radius of 2150 m. If the outer ring is to simulate the gravity on Earth and the
inner ring to simulate the gravity on Mars, what does the radius of the inner ring have to be?

4. A stone is tied to a string (length 0.950 m) and whirled in circle at the same constant speed two ways. First
the circle is horizontal and the string is nearly parallel to the ground. Next, the circle is vertical. In the
vertical case the maximum tension in the string is 10.0% larger than the tension that exists when the string is
horizontal. Determine the speed of the stone.

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