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2014 WAEC Physics Theory A metallic bar 50 cm long has a uniform cross-sectional area of 4.0 cm\(^2\). If...

Physics
WAEC 2014

A metallic bar 50 cm long has a uniform cross-sectional area of 4.0 cm\(^2\). If a tensile force of 35 kN produces an extension of 0.25 mm, calculate the value of Young's modulus

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Explanation

E \(\frac{Fl}{Ae}\)

= \(\frac{35 \times 10^3 \times 50 \times 10^{-2}}{4 \times 10^{-4} \times 0.25 \times 10 ^{-3}}\)

= 1.75 x 10\(^{11}\)Nm\(^{-2}\)

 


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