The beam cross section below has a shear force of S, applied at the shear centre (SC). This produces sectional shear forces of Q1 and Q2 as indicated (both above and below the mid-line). Note the horizontal distance between the vertical parts and the apex, marked at the top and the angle of 45 degrees. The section is symmetrical about the horizontal mid-line. 70 cm l Q 9 The value of Q1 is 124 N The value of Q2 is 84 N By working out the value of S, find the value of ey. Enter your answer as a value in cm, to 1 decimal place, without the units.