JAMB - Physics (1982 - No. 33)

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
3.3cm
6.5cm
7.5cm
10.8cm
15.0cm

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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