5. Momenty odśrodkowe :

I_1ξ0η0 = 0 + 176 • (−4.584) • (1.026) = −827.760

I_2ξ0η0 = 0 + 100.531 • (5.189) • (1.026) = 535.218

I_3ξ0η0 = 0 + 176 • (3.416) • (1.026) = 616.848

$I_{4\xi 0\eta 0} = - \frac{22^{2} \bullet 5^{2}}{72} + 55 \bullet 5.749 \bullet \left( - 4.693 \right) = - 1315.547$

I_ξ0η0 = −827.76 + 535.218 + 616.848 − 1315.847 = −991.547cm⁴ = −9.915 • 10⁻⁴

6. Główne centralne osie bezwładności:

$\psi = arctg \bullet \frac{2 \bullet ( - 991.541)}{10163.332 - 2578.58} = - 14.6523$

φ = −7.3262

7.Ekstremalne wielkości :

$I_{\max} = \frac{2578.58 + 10163.332}{2} + \sqrt{({\frac{2578.58 - 10162.332}{2})}^{2} + \left( - 991.541 \right)^{2}} = 6370.956 + \backslash t\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 3919.8557 = 10290.8117\text{cm}^{4} = 0.01029m^{4}$

I_min = 6370.956 − 3919.8557 = 2451.1003cm⁴ = 2.4511 • 10⁻³m⁴