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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?

  1. 580 N
  2. 290 N
  3. 1160 N
  4. 118 N

2.

What is the gravitational force between two 7.00 kg spheres whose centers are separated by 35 cm?

  1. 2.7x10-8
  2. 1.1x10-7
  3. 7.9x10-9
  4. 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:

  1. 4 years
  2. 2 years
  3. 1 year
  4. 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:

  1. always positive
  2. zero
  3. always negative
  4. 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. 1/2
  2. 1
  3. 2
  4. -1
  5. -2

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