35 55 N L/4 a horizontal rod, of length 12.0 m, with forces acting on it. L/2 D L/2 A 15 N /20 40 25 N a) What is the net torque (in N-m) on the rod about an axis through B perpendicular to the page? Give magnitude and direction. b) What force should be placed at point D. perpendicular on the rod to prevent the rod from rotating. Give magnitude and direction.