Solving Forces: Balancing Force with -43.6°

[mchei]

Homework Statement

The Attempt at a Solution

define RHS as +ve
in a part, i have calculared that force by conveyor is +1.962N

in b part,

then, to balance force, 4.91sin@+1.962=1.962cos@ => @=-43.6'
i an confused about the negative sign... what is my problem?

 

[JaWiB]

Your free body diagram is missing a normal force due to the belt

 

[mchei]

Your free body diagram is missing a normal force due to the belt

that's true, thx

 

[mchei]

help =[