Question

Why isn't there a net force when two rods touch each other?

Answer 1

because the force applied by one rod is balanced by the other rod.
Both the forces are equal and in opposite direction.
so the net force is zero.
done.
feel free to ask any doubt.

Answer 2

Hey !

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So when the object close to each other there ir gravitational force. Value of G is 6.67 x 10^ -11 N m^2 Kg ^ -2. Value of G is 6.67 x 10^ -11 N m^2 Kg ^ -2.

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Thanks !