body a in the figure weighs

Body A in the figure weighs 102 N, and body B weighs 32 N. The coefficients of friction between A and the incline are ms = 0.56 and mk = 0.25. Angle u is 40°. Let the positive direction of an x axis be up the incline. In unit-vector notation, what is the acceleration of A if A initially (a) at rest, (b) moving up the incline, and (c) moving down the incline?

[@ashleyurbina1055]

maaaan i've missed you, you really helped me with physics, can u do more of Newton's Law? :C

[@idontknow9713]

pardon me, but why would the tension in body b's free body diagramme be set to negative and weight to positive. And if it were to be done otherwise, it would be incorrect?

[@idontknow9713]

is it because of the direction of the acceleration, perhaps? if it is, then forgive me for the idiotic question

[@aaliyahramos5033]

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[@ibrahimsabra705]

you know my professors take problems of exam from you

[@guggystyle]

Hmm, perhaps he owes me some royalties.

[@ibrahimsabra705]

@@guggystyle i will let him know after exams