Question 1 Calculate the mass ( in metric tons of a blade made of Aluminum , M .All Setting the stress limit equal to fatigue limit of the material , of 150 M Pa 1500 Incorrect Response First you need the formula to calculate the mass of the material ( Mblade ) leg . 6 from the introduction page ) Mblade - Amat pro 2 ( After + Aplace To Prat Next step is to find the formulas for the cross - section A flap and A edge ( derived in 1 . Quiz question 3 , and 4 ) AMap - 87 Pair V 2 1 BI g thup flap Print 90 page heads Bind 92 0 flap Calculate the A Map and A edge Find the value of Mblade