A force $$ F $$ varies directly as the product of two masses...

Question Analysis
This problem assesses the understanding of combined variation, specifically direct and inverse variation in a physics context.

Key Concept Explanation
In combined variation, varies directly with the product of and and inversely with the square of . The relationship can be expressed as .

Step-by-step Solution
1. Given:
2. Substitute known values:
3. Solve for