Solve the problem.
-The gravitational attraction A between two masses varies inversely as the square of the distance between them. The force of attraction is 9 lb when the masses are 2 ft apart, what is the attraction when the masses are 6 ft
Apart?
A) 2 lb
B) 3 lb
C) 4 lb
D) 1 lb

Question

Quizplus · Accepted Answer

The gravitational attraction A varies inversely as the square of the distance, so A = k/d^2. Given A = 9 lb when d = 2 ft, we find k = 9 * 2^2 = 36. For d = 6 ft, A = 36/6^2 = 36/36 = 1 lb.

Solve the Problem. -The Gravitational Attraction a Between Two Masses Varies Inversely as Varies