Physics
JAMB 1982
A 10g mass placed on the pan of a spring balance causes an extension of 5cm. If a 15g mass is placed on the pan of the same spring balance, the extension is
-
A.
3.3cm
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B.
6.5cm
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C.
7.5cm
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D.
10.8cm
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E.
15.0cm
Correct Answer: Option C
Explanation
F \(\alpha\) e and m \(\alpha\) F
\(\frac{m_1}{e_1}\) = \(\frac{m_2}{e_2}\)
\(\frac{10}{5}\) = \(\frac{15}{e_2}\)
e2 = 7.5cm
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