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Motion in the universe

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Question 26

This question is about planets and satellites in the solar system.

a.

Planets in the solar system have different sizes and masses. The bar chart shows the gravitational field strength of each planet compared to Earth.

A bar chart showing the gravitational field strength compared to Earth.

(i) Which of these statements is correct?

  • A A 1 kg mass would weigh more on Mars than on Earth
  • B A 1 kg mass would weigh more on Jupiter than on Saturn
  • C A 1 kg mass would weigh more on Mercury than on Venus
  • D A 1 kg mass would weigh more on Uranus than on Earth
[1]
b.

On Earth, the gravitational field strength is 10 N/kg. Which of these is the value for the gravitational field strength on Jupiter?

  • A 0.25 N/kg
  • B 2.5 N/kg
  • C 10 N/kg
  • D 25 N/kg
[1]
c.

Phobos is a natural satellite of Mars. Phobos has an orbital time period of 460 minutes460\text{ minutes}460 minutes and an orbital speed of 2140 m/s.

(i) Calculate the orbital radius of Phobos.

[4]
d.

The diagram shows Phobos in orbit around Mars.

A diagram showing Phobos orbiting Mars with arrows representing force directions.

Which arrow shows the direction of the force of gravity that Mars exerts on Phobos?

  • A Arrow A
  • B Arrow B
  • C Arrow C
  • D Arrow D
[1]

Motion in the universe Questions

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