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Questions  

The resultant of two forces has a magnitude 1 N. One of the forces has a magnitude of 3N and makes an angle of 30° with the resultant. The magnitude of the other force is        

a
1/2 N
b
1 N
c
3 N
d
32 N

detailed solution

Correct option is B

R2=P2+Q2+2PQcosθ and tanα=QsinθP+Qcosθ , square the second and solve

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