Question

In the formula \[F=G\frac{mM}{r^2}\], what does 'r' represent?

Options

• The length of the light rigid rod

• The radius of the small spheres

• The distance between the centers of the two masses

• The angle of twist of the suspension wire

Answer 1

The distance between the centers of the two masses

Explanation:

'r' is the separation distance between the centers of the two masses, not any other measurement in the apparatus.