# pre calculus

Use Hooke's Law for springs, which states that the distance a spring is stretched (or compressed) varies directly as the force on the spring.

A force of 265 newtons stretches a spring 0.15 meter.
(a) What force is required to stretch the spring 0.2 meter? (Round your answer to two decimal places.)

N

(b) How far will a force of 100 newtons stretch the spring? (Round your answer to two decimal places.)
m

1. since d/F is constant,

.15/265 = .2/x

and,

.165/265 = x/100

Note that you don't really have to find k, the constant of proportionality. You can go ahead and find it, but your answers will be the same.

posted by Steve

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