When two solid spheres of the same material and same radius r are ...

[craiczarry]

When two solid spheres of the same material and same radius r are in contact, the magnitude of the gravitational force each exerts on the other is directly proportional to
 a. r.
  b. r2.
  c. r3.
  d. r4.
  e. r6.

Question 2

Three galaxies, each of mass m = 4.0  1041 kg, lie in a plane at the corners of an equilateral triangle with sides of 5.0  1022 m length. The magnitude of the force the other two galaxies exert on each galaxy is
 a. 4.3  1027 N.
  b. 6.4  1027 N.
  c. 7.4  1027 N.
  d. 8.6  1027 N.
  e. 4.3  1028 N.

[Bison]

Answer to Question 1

d

Answer to Question 2

c

[craiczarry]

Thank you!

[Bison]

Always glad to help...