Question

The distance a spring will stretch varies directly with how much weight is attached to the spring. If a spring stretches 11 inches with 75 pounds attached, how far will it stretch with 65 pounds attached? Round to the nearest tenth of an inch.

Answer 1

The spring will stretch to 9.5 inches.

Explanation:

The distance a spring will stretch varies directly with how much weight is attached to the spring.

A spring stretches 11 inches with 75 pounds.

Let it stretches to 'x' inches with 65 pounds weight.

We can solve this as :

`(11)/(x) = (75)/(65)`

`75x=715`

x=9.5

Therefore, the spring will stretch to 9.5 inches.

Answer 2

find ratio:
y = Kx
11 = K(75)
k = 11/75

now find new value:
y = (11/75)*65

y = 9.5 inches