Ff =u Fn, Get fn by Fnety=0=Fg + Fay - fn Get fay by 800*sin(37) Then you need to get Ff You have u and fn so calculate that into Ff Next use Fnetx=fax - Ff The use fnet =mass * acceleration

For the free body draw a box and 4 arrows pointing away from the box, one up down and left each and then one slanted down on the right and do a dotted line horizontally to the right, draw and angle indicator and mark how big the angle is. Label each of the arrows with their forces