Question

part d
keeping the mass of the balls equal, decrease the distance between them. what happens to the force arrows?

Explanation:

Relate distance to gravitational force

Using the Universal Law of Gravitation and Gravitational Force Factors knowledge points

$$ F = G \frac{m_1 m_2}{r^2} $$

Determine the effect of decreasing distance

Using the Gravitational Force Factors knowledge point

$$ r \downarrow \implies F \uparrow $$

Describe the change in force arrows

Using the Gravitational Force Factors knowledge point

$$ F \uparrow \implies \text{The force arrows grow longer (increase in size).} $$

Answer:

The force arrows grow longer (increase in size).