Author Question: Suppose we could magically triple the distance between Earth and the moon. This would cause the ... (Read 123 times)

stevenposner · **on:** Jul 29, 2018

Suppose we could magically triple the distance between Earth and the moon. This would cause the gravitational force by Earth on the moon to be

A) increased to three times its former value.
B) be unchanged.
C) reduced to 1/4 of its former value.
D) reduced to 1/3 of its former value.
E) reduced to 1/9 of its former value.

Question 2

Three objects are located in the x-y plane as follows: a 6 kg-object is at (0 m, 0 m), a mass of 4 kg is at (3 m, 0 m), and a 2 kg-object is at (0 m, 3 m). Where is the center of mass of the system?

A) (1 m, 2 m)
B) (2 m, 1 m)
C) (1 m, 1 m)
D) (1 m, 0.5 m)
E) (0.5 m, 1 m)