Question

F is directly proportional to R to the power 4

Answer 1

Answer:The gravitational force of attraction between two identical spheres of radius r is

F=  

r  

2

 

Gm  

1

​  

m  

2

​  

 

​  

=  

(2r)  

2

 

G  

3

4

​  

πr  

3

ρ×  

3

4

​  

πr  

3

ρ

​  

 

=  

9

4

​  

π  

2

ρ  

2

r  

4

 

i.e. F∝r  

4

Explanation: