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m = 45 kg ; h = 2 m, -4, %3D, as. Here,, L = 0.50 m; A=5 × 10ªm², Loss in gravitational energy, Gain in elastic energy in both leg bones, × Stress x Strain, x Volume, So,, mgh = 2×, %3D, Here,, -4, Volume, AL = 5 × 10 x 0.50, %3D, = 2.5 x 10 m, 10.9x 108 x Strain, 2., .. 45 x 10 × 2 = 2×, %3D, × 2.5 x 104, 45 x 10 x 2, or, Strain =, 30.04, %3D, 0.9 x 2.5 x 104, Stress, Y =, Strain, %3D, 0.9 × 108, 0.04, = 2.25 x 10° Nm, -2, %3D