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Find the greatest length of copper …

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Find the greatest length of copper wire, that can hang without breaking. Breaking stress =7.2×10rase to the power 7N/m×m Density of copper is 7.2gm/cm,g=10m/s×s

Posted by Anushka Pal 6 years, 11 months ago

CBSE > Class 11 > Physics

3 answers

∂Αяѕнαиαα ყα∂Αѵ ??? 6 years, 11 months ago

yhi hona chahhiye.. ?

∂Αяѕнαиαα ყα∂Αѵ ??? 6 years, 11 months ago

mass = density * volume........... ➡️mass = 7.8*10^3 * AL........ g =9.81 m/s² ➡️weight = (7.8 * 10^3 * AL * 9.81) = 7.65 * 10^4 * AL ➡️stress = breaking force / cross sectional area ✴️ 7.2*10^8 = 7.65 * 10^4 * AL / A ✴️ 7.2*10^8 = 7.65 * 10^4 * L ✴️ L = 7.2*10^8 / (7.65 * 10^4) ✴️ L = 9.4 * 10^3 m

Anushka Pal 6 years, 11 months ago

Plz reply me.... *raise

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