Solving Forces: Balancing Force with -43.6°

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Homework Statement



RZiwx.png


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,
Aer7X.png

then, to balance force, 4.91sin@+1.962=1.962cos@ => @=-43.6'
i an confused about the negative sign... what is my problem?
 
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Your free body diagram is missing a normal force due to the belt
 
JaWiB said:
Your free body diagram is missing a normal force due to the belt

that's true, thx
 
help =[
 

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