Auniform beam of length l and mass m has its lower end pivoted at p on the floor, making ạn angle θ with the floor. a horizontal cable is attached at its upper end b to a point a on a wall. a box of mass m is suspended from a rope that is attached to the beam one-fourth l from its upper end otheexpertta. com 25% part (a) write an expression for the y-component py of the force exerted by the pivot on the beam(b) write an expression for the tension t in the horizontal cable ab 25% part (c) write an expression for the x-component px of the force exerted by the pivot on the beam, in terms of t. 25% part (d) what is the tension in the horizontal cable, in newtons, if the mass of the beam is 49 kg, the length of the beam is 6 m, and the angle is 41°?