Newton explained why the Moon orbits the Earth.  Newton's explanation enables astronomers to determine the mass of an object.  Why is

Two masses are attracted by a gravitational force of 9.3 N. What will the force of attraction be if the distance between the two masses is quadrupled? The force of attraction will be ? N.

If the distance between the Earth and the Sun were doubled, which of the folloing would be true? and why? a. The gravitational force doubles b. The gravitational force gets half as big c.The gravitational force gets 4 times as big d.The gravitational force gets 1/4 as big

Two identical planets (in size and mass) named Nutron and Cruton, orbit their star, Ensalada, in circular orbits about its equator.  Cruton is 3 times further away than Nutron is.  How does Cruton’s orbital speed compare with Nutron’s?    Group of answer choices a) It is faster. b) It is the same. c) It is slower d) Cannot be determined from given information.

A Space probe is launched from Earth headed for deep space. At a Distance of 10,000 miles from Earths center, the gravitational force on itis 600lb. What is the size of the force when it is at each if the following distances from earths center?  A.  20,000 miles b. 30,000 miles c. 100,000 miles

Since Galileo observed that a body near Earth falls with an acceleration that is independent of the body's mass, what does the Third Law tell us about how gravity depends on the mass of the Earth?     It doesn't tell us anything since we are standing on Earth.     It tells us the force of gravity does not depend on the mass of the Earth.     It tells us that the force of gravity does not depend on the mass of the object.     It tells us that a Law of Gravity depends on the mass of the Earth in the same way it depends on the mass of the falling body.

E14. The acceleration of gravity at the surface of the moon is approximately that at the surface of the Earth (9.8 m/s 2 ). What is the weight of an astronaut standing on the moon whose weight on Earth is 210 lb?