As a scientist and mathematician, you must help Sir Isaac Newton calculate the force of gravity of the Sun, Moon, and Earth.  Use your new-found knowledge to answer these five questions on a seperate sheet of paper.  You may need to refer back to the informational pages to find what you need to complete the questions.  Remember from the site on the Universal Law of Gravity what the formula is and what the variable G stands for.  Show all your work.  When you are finished, hand in your paper to be graded.

1.  What is the force of gravity (Fg) of the Sun on the Earth?

2.  What is the Fg of the Earth on the Moon?

3.  You are 5km from a large boulder with a mass of 4.3x10^5kg.  What is its Fg on you given that 1 lb is .453kg?

4.  If the Fg is 5.06x10^-10 of a small planet with a mass of 70.84kg on its moon with a mass of 56.625kg, what is the distance between the planet and its moon?

5.  An asteroid with a mass of 4.03x10^13kg is about to enter our orbit.  It is currently 1673km away from Earth.  What is Earth's Fg on the asteroid?  Will it collide into Earth or be pulled toward the Moon instead?  If it collides with either the Moon or the Earth, which will be destroyed?

To conclude your mission click here
Law of Gravity | Universal Law of Gravity | Earth in Orbit

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