Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Physics
Physics
Problem
Infinite number of masses, each of mass
m
m
m
, are placed along a straight line at distances
r
,
2
r
,
4
r
,
8
r
,
…
r, 2r, 4r, 8r, \dots
r
,
2
r
,
4
r
,
8
r
,
…
from a reference point
O
O
O
. The gravitational field at
O
O
O
will be
x
G
m
3
r
2
\frac{x Gm}{3r^2}
3
r
2
x
G
m
. Find
x
x
x
.
Browse the problem library