Anyone know?

The distance d that a spring will stretch varies directly as the force f applied to the spring. If a force of 6 lb is required to stretch the spring 3 in., what force is required to stretch the spring a = 7 in.?

Question

Anyone know?

The distance d that a spring will stretch varies directly as the force f applied to the spring. If a force of 6 lb is required to stretch the spring 3 in., what force is required to stretch the spring a = 7 in.?

amistre64 · Answer

its a direct variation

amistre64 · Answer

lb = k in

k = lb/in

amistre64 · Answer

lb = 2 in

anonymous · Answer

I don't understand this stuff.  Thank You

amistre64 · Answer

well, think of it like this:

the force is twice the distance

if distance = 3; force = 2*3 = 6

if distance = 7; force = 2*7

anonymous · Answer

oh ok.  That makes sense.  I guess I am just very intimidated by word problems.