1. What happens to the gravitational force between two objects if the distance between them triples?

A. The force increases by a factor of 3
B. The force decreases by a factor of 9
C. The force increases by a factor of 9
D. The force decreases by a factor of 3

2. By what factor does the gravitational force between two objects increase if one object doubles in mass and the distance between them decreases by half?
A. 4
B. 2
C. 8
D. 1

3. What must be the units for the gravitational constant G in order for gravitational force to have units of newtons?
A. m3/(kg2⋅s2)
B. m3/(kg⋅s)
C. m3/(kg⋅s2)
D. m3/(kg2⋅s)

4. What happens to the gravitation force between two objects that are 15 m apart, when one of them moves 3 m closer?
A. It increases by a factor of 1 1/4
B. It decreases by a factor of 1 1/4
C. It increases by a factor of 1 9/16
D. It decreases by a factor of 1 9/16

5. In thinking about the uniform distribution of a gravitational field over a sphere, why does gravitational force have an inverse-square relationship with the distance between objects?
A. because the volume of a sphere is proportional to its radius
B. because the volume of a sphere is proportional to the square of its radius
C. because the surface area of a sphere is proportional to the square of its radius
D. because the surface area of a sphere is proportional to its radius

My answers:
1. B
2. C
3. A
4. B
5. D

7 answers

3 C
4 C
5 area = 4 pi r^2 and volume = (4 /3) pi r^3
like area = dV/dr = 3(4/3) pi r^2
Gravitational Attraction Quick Check:
1. B - The force decreases by a factor of 9.
2. C - 8
3. C - m3/(kg •s2)
4. B - It increases by a factor of 1 9/16.
5. D - because the surface area of a sphere is proportional to the square of it's radius.
No Name is 100% correct :)
Thanks @No name
For two objects experiencing between them, the strength of the force increases as Response area increases, and decreases as Response area increases. pls help me
You will be getting reported for CHEATING!!! Do not use these answers!!!
You a snitch!! :(