Assume: Down the plane is the positive direc-tion and up the plane is the negative direction.A block of mass 160 kg slides on a friction-less plane inclined at 25◦ with the horizontalunder the influence of a restraining force of728 N acting parallel to the incline and up theincline.The acceleration of gravity is 9.8 m/s2 .160 kgF25◦What is the magnitude of the accelerationk~ak of the block?Answer in units of m/s2.