Question

Mars has a diameter of approximately 0.5 of that of earth and mass of 0.1 of that of earth. The surface gravitational field strength on Mars as compared to that on earth is a factor of-
(1) 0.1 (2) 0.2 (3) 2.0 (4) 0.4

Answer 1

Thank you for asking this question. The question seems to be incomplete. Here is the complete question:

Mars has a diameter approximately 0.5 that of the Earth, and a mass of 0.1 that of the Earth.

If the gravitational potential at the Earth’s surface is –63 MJ kg–1, what is the approximate value of the gravitational potential at the surface of Mars?

A: –13 MJ kg–1

B: –25 MJ kg–1

C: –95 MJkg–1

D: –320 MJ kg–1

Answer:

The formula for gravitational potential is V=-GM/r

Take all these values as 1 for Earth, -GM/r = -63 MJkg^-1

the mass of Mars is 0.1M and the radius is 0.5r

When we put all the values in the formula, we will get this:

V=0.2(-GM/r)

Now we will have the value of -GM/r we will multiply it by 0.2

Then you will be able to get the gravitational potential at the surface of Mars.

If there is any confusion please leave a comment below.

Answer 2

Answer: the correct answer is D) 0.4

Explanation: