What do the length of the cord and gravity determine for a pendulum?
2 answers:
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The gravitational force between two objects is given by
where
G is the gravitational constant
m1 and m2 are the masses of the two objects
r is the separation between the two objects
In this problem,
, 
and 
, therefore the gravitational force between the two objects is
where
G is the gravitational constant
m1 and m2 are the masses of the two objects
r is the separation between the two objects
In this problem,