Question

The length of a spring varies directly with the mass of an object that is attached to it. When a 30-gram object is attached,

Answer 1

Answer:

s = 0.3m

Step-by-step explanation:

Given that s varies directly with m then the equation relating them is

s = km ← k is the constant of variation

To find k use the condition

s = 9 when m = 30

9 = 30k ( divide both sides by 30 )

$\frac{9}{30}$ = k

s = $\frac{9}{30}$ m or

s = 0.3m ← equation of variation