Knowledge and Understanding continued... Communication (17 marks) 6. Two forces of 40N and 80N act at an angle of 55 to each other. Find the magnitude 4. Calculate the torque when a 100N force is applied at an angle of 850 to the end of a and direction of the equilibrant force. (Include a diagram representing the forces) 60cm wrench. (3 marks) (5 marks) 5. Given the vector u = [2,6, -3] (4 marks) a) Draw the vector. 7. Given vectors u = [x, y,5] , v = [3,1, -4], and w = [7,7,7] , find x and y such that u xu = w. (3 marks) b) Determine a unit vector collinear with u