Question

The maximum value of resultant of two forces is 5N and the minimum value is 1N. Find the resultant of the forces when they act at an angle of 600.
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Answer 1

Answer:

F1+F2 = 5 and

F1-F2 = 1, so

F1 = 3 and F2 = 2

When the angle between F2 and F2 is 60 then the resultant is,

F = √( F1^2 + F2^2 + 2× F1 × F2 × cos 60)

F = √( 9+4+6)

Your answer would then be,

F = √ 19