Two forces A and B whose magnitude are in the ratio 3 : 5 give a resultant of 28 N. If the angle of their inclination is 60°, then the magnitude of force B will be-N.
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(20.00)
Let A and B be the two forces.
Then A = 3x; B = 5x, R = 28N and 
= 60°.
We know that 
Hence, force B = 5 x 4 = 20N
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