Question
1. What would the weight of a 59.1 kg astronaut be on the surface of a planet twice as massive as Earth and having twice
1.
What would the weight of a 59.1 kg astronaut be on the surface of a planet twice as massive as Earth and having twice Earth's radius?
- 580 N
- 290 N
- 1160 N
- 118 N
2.
What is the gravitational force between two 7.00 kg spheres whose centers are separated by 35 cm?
- 2.7x10-8
- 1.1x10-7
- 7.9x10-9
- 3.3x10-7
3.
If the Earth was twice as massive but revolved around the sun at the same distance as is does now, the orbital period would be:
- 4 years
- 2 years
- 1 year
- 6 months
4.
A satellite completes one full circular orbit around the Earth. The work performed by the Earth's gravitational force on the satellite is:
- always positive
- zero
- always negative
- positive more than negative
5.
What is the ratio of potential energy to kinetic energy for a comet that has just enough energy to escape the Sun's gravitational field? (Please use accepted conventions)
- 1/2
- 1
- 2
- -1
- -2
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