In the figure two blocks are connected over a pulley

In the figure, two blocks are connected over a pulley. The mass of block A is 10.0 kg and the coefficient of kinetic friction between A and the incline is 0.20. Angle θ of the incline is 30.0°. Block A slides down the incline at constant speed. What is the mass of block B?

[@alexrodarte8963]

For the angle of the mag force why cant we go in the reverse direction and call it -110 degrees ?

[@adilahnaf1264]

Thanks

[@area4241]

why is fk in the direction of motion

[@willemvanoosterum4407]

It's not

[@jacksotomonte]

your anwser is wrong check out

[@On99123]

i think you are wrong