Circular Motion: Why Centripetal Accel Negative in i Dir & Positive in j Dir?

haha1234
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Homework Statement


Homework Equations


The Attempt at a Solution


Why the centripetal acceleration is negative in i direction and positive in j direction?
 

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haha1234 said:
Why the centripetal acceleration is negative in i direction and positive in j direction?
From B, which way does the vector -i cos 35 + j sin 35 point?
What direction would you expect the centripetal acceleration to be in?
 
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I recommend graphing the vector on your diagram, then graphing the vector alone. Plotting vectors always helps! Good luck.
 

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