Question

7. Two satellites are moving around Earth following orbits of the same radius. Satellite 1 has mass equal to half of mass of satellite 2. We can conclude that:

1. Speed of satellite 1 is twice as big as speed of satellite 2.
2. Speed of satellite 1 is half of speed of satellite 2.
3. Speed of satellite 1 is the same as speed of satellite 2.
4. Speed of satellite 1 in fours times speed of satellite 2.
5. Speed of satellite 1 is ¼ of speed of satellite 2.

8. A planet is orbiting some star X in constellation far, far away. Orbit of the planet has the same diameter and orbital diameter of Earth around Sun, but mass of star X is nine times greater than mass of our Sun. In terms of Earth’s period around Sun, what will be the period of that planet around star X?

1. 1/9 of Earth’s
2. 1/3 of Earth’s
3. Same as Earth’s
4. 3 times of Earth’s
5. 9 times of earth’s.

Answer 1

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