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Q.

The 50 kg homogeneous smooth sphere rests on the 30° incline A and bears against the smooth vertical wall B. Calculate the contact forces at A and B. (g=10m/s2)

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a

NA=1003N,NB=5003N

b

NB=10003N,NA=5003N

c

NA=10003N,NB=503N

d

NA=10003N,NB=5003N

answer is B.

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Detailed Solution

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NA cos 300 = mg
NA sin 300 = NB

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