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A weight of 15 ounces stretches a spring 10 inches. A weight of 24 ounces stretches the same spring 16 inches. How many inches does the spring stretch per ounce of additional weight?

Respuesta :

F = k x 
15 = k *10 
k = 1.5 

check: 
24 = 1.5 x 
x = 16 sureenough 

so 1.5 oz/inch 
= 1/1.5 inches/oz = 2/3 = 0.6666.... in/oz

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