Question
Two spheres (m_(1) and m_(2)) are separated a distance d, apart. The gravitational force between the two spheres is 41 N. If the spheres are separated to a distance of 3 times the original distance what is the new gravitational force between the spheres? m1 m2
Solution
4.7
(231 Votes)
Lina
Master ยท Tutor for 5 years
Answer
The gravitational force between two masses is given by Newton's law of universal gravitation:
where:-
is the gravitational force,-
is the gravitational constant (\(6.674 \times 10^{-11} \, \text{N}\cdot(\text{m/kg})^2\)),-
and
are the masses of the two spheres,-
is the distance between the centers of the two masses.Initially, the gravitational force is 41 N when the distance is
. If the distance is increased to 3 times the original distance, the new distance becomes
.The new gravitational force
can be calculated using the same formula, but with the new distance:
This simplifies to:
Since the initial force
, we can express
in terms of
:
Substituting the known value of
:
Therefore, the new gravitational force between the spheres when they are separated by a distance of 3 times the original distance is approximately 4.56 N.