Find magnitude of gravitational force a61.8kg person experience while standing on surface of Earth with mass of 5.98x10^24kg and a radius of6.37x10^m. The universal gravitational constant is 6.673 x 10^-11 N times m^2/kg^2. Answer in units of N. Find the magnitude of the gravitational force on Mars, with a mass of 6.34 x 10^23 kg and a radius of 3.43 x 10^6 m. Answer in units of N. Find the magnitude of the gravitational force on Pluto, with a mass of 1.32 x 10^22 kg and a radius of 1.15 x 10^6 m. Answer in units of N.

Expert Answers

An illustration of the letter 'A' in a speech bubbles

For all of these questions, you need to use the following equation, which will tell you the force of gravity in those situations:

Fg = (Gm1m2)/r^2

where G is the universal gravitational constant, m1 and m2 are the masses of the objects, and r is the distance that separates their...

Unlock
This Answer Now

Start your 48-hour free trial to unlock this answer and thousands more. Enjoy eNotes ad-free and cancel anytime.

Start your 48-Hour Free Trial

For all of these questions, you need to use the following equation, which will tell you the force of gravity in those situations:

Fg = (Gm1m2)/r^2

where G is the universal gravitational constant, m1 and m2 are the masses of the objects, and r is the distance that separates their centers.

So then you just plug in the numbers you have provided.  I will note that the proper radius of the Earth is 6.37 x 10^6.

Force on Earth: 6.08 x 10^3 Joules

Force on Mars: 2.22 x 10^2 Joules

Force on Pluto: 4.12 x 10^1 Joules

Approved by eNotes Editorial Team