lizzyhearts
29.07.2019 •
Physics
The length that a hanging spring stretches varies directly with the weight placed at the end of the spring. if a weight of 11lb stretches a certain spring 7in., how far will the spring stretch if the weight is increased to 44lb ?
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Ответ:
28 inches
Explanation:
Force is directly proportional to the stretched length
F ∝ d
11 ∝ 7 ... (1)
Let it is stretched by r
44 ∝ r ... (2)
Divide equation (2) by equation (1), we get
44 / 11 = r / 7
4 x 7 = r
r = 28 inches
Ответ:
I thought x point is right