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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A 40 kg boy whose leg bones are 4 cm² in area and 50 cm long falls through a height of 50cm without breaking his leg bones. If the bones can stand a stress of 0.9 X 10^8 N/m². Calculate Young’s Modulus for the material of the bone.

A 40 kg boy whose leg bones are 4 cm² in area and 50 cm long falls through a height of 50cm without breaking his leg bones. If the bones can stand a stress of 0.9 X 10^8 N/m². Calculate Young’s Modulus for the material of the bone.

Assuming young's modulus of aluminum to be 7 x 10^10 N/m^2 find energy stored in an aluminium rod of cross section 10^-4 m^2 and 0.1 m long when compressed by a load of 10 kg.