Problem 4.2 The uniform, horizontal beam shown in Figure 4.50is hinged to the ground at A and supported by a frictionless roller at D. The distance between A and B is = 4 m and the distance between A and D is d = 3 m. A force that makes an angle B = 60° with the horizontal is applied at B. The magnitude of the applied force is P 1000 N. The total weight of the beam isW = 400 N.= By noting that three-quarters of the beam is on the left of the roller support and one-quarter is on the right, calculate the x and y components of reaction forces on the beam at A and D.