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WA Dynamics question 9


gdaunton

Question

I'm having trouble with question #9

 

for a it's just a simple normal force question with a block on an angle. So I did the usual mgcos(angle) = Fnormal and it didn't work.

 

for b I used Fhor - mgsin(angle) = ma, solved for the acceleration and it also didn't work.

 

I'm I missing something here?

 

 

 

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