Multiple choice

Using agrav=Gm/r2 to calculate the gravitational field strength for Mars, m and r represent:

  1. The mass and radius of the Sun

  2. the mass and radius of Mars

  3. the mass of the Sun and the radius of Mars

  4. The Sun's mass and the average distance from Mars to the Sun
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B Correct answer
Explanation

In the formula a_grav = GM/r^2, M represents the mass of the central body creating the gravitational field, and r represents the distance from the center of that body. For Mars, these are the mass and radius of Mars.

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