SOLUTION: The length a spring stretches is directly proportional to the force applied. If a force of 6 pounds stretches a spring 4 inches, how much force is necessary to stretch the same spr

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Question 1098237: The length a spring stretches is directly proportional to the force applied. If a force of 6 pounds stretches a spring 4 inches, how much force is necessary to stretch the same spring 7 inches?
Found 2 solutions by Boreal, addingup:
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
y=kx, y is dependent and the amount of stretch. Force is independent and controlled (x)
4=k*6
k=(2/3)
use k in the next part
7=(2/3)*x
x=10.5 pounds

Answer by addingup(3677) About Me  (Show Source):
You can put this solution on YOUR website!
IF it's directly proportional:
7/x = 4/6
x/7 = 6/4
x = 10.5 pounds