A spiral spring has a length of 14cm when a force of 4N is hung...
PHYSICS
WAEC 2017
A spiral spring has a length of 14cm when a force of 4N is hung on it. A force of 6N extends the spring by 4cm. Calculate the unstretched length of the spring
Explanation
.jpg)
Using hookes law
\(\frac{F_1}{e_1} = \frac{F_2}{e_2}\)
but e\(_1\) = l\(_1\) = l\(_o\)
\(\frac{F_1}{l_1 - l_o}\) = \(\frac{F_2}{e_2}\)
\(\frac{4}{14 - \_o}\) = \(\frac{6}{4}\); 16 = 6(14 - \(_o\))
14 = 84 - 6\(l_o\); 16 - 84 = -6\(l_o\)
\(l_o = \frac{-68}{-6}\) = 11.33cm
Post an Explanation Or Report an Error
If you see any wrong question or answer, please leave a comment below and we'll take a look. If you doubt why the selected answer is correct or need additional more details? Please drop a comment or Contact us directly. Your email address will not be published. Required fields are marked *