Need some help on this Physics prob involving static friction?

  • Thread starter Thread starter Stephanie S
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Stephanie S

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If the coefficient of static friction between an incline and block is .30, then what is the minimum force F needed to prevent the block from sliding? m=20 kg and Θ=50 degrees

Can someone help me with this problem please? It is on a practice test I am doing..I already know that the answer is 374 N, but I keep coming up with 112 N and am not sure what I'm doing wrong.
 
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