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MECHANICS =O

A

abuhantash

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ok first CM of cone from base is 20/4 = 5 .
Then to find theta (Q) you do tanQ = 10/5 and Q=26.6 !!
(ii) not slidng ( im talking U as coef of friction)
F <= UR
mg sin Q <= U mg cos Q
U >= tan Q sooo U >= 0.5
 
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