SOLUTION: F varies directly with m and inversely with the square of D If F=150 when m=240 and d=8, find F when m=360 and d=3.

Question 992662: F varies directly with m and inversely with the square of D
If F=150 when m=240 and d=8, find F when m=360 and d=3.
Answer by rothauserc(4718) (Show Source): You can put this solution on YOUR website!
we use k as the constant of proportionality, then
F = mk / d^2
we are given F = 150, m = 240, d = 8
150 = 240k / 8^2
240k = 9600
k = 40
*************************************
our formula becomes
F = 40m / d^2
we are given m=360, d= 3
F = (40*360) / 3^2
F = 1600

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