Two forces act a point The magnitude of the Two forces are F, 2 newton and the measure of the angle between them is 60, if their resultant equal 2√3 newton,then F =newton
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Expert's answer
2021-11-02T14:12:19-0400
Given: Two forces as 2 N and F N, angle between them is 60°and their resultant is 23 N.
We know that,
R=R12+R22+2R1R2cosθ
⇒23=22+F2+2×2×Fcos60°⇒23=4+F2+2F[∵cos60°=21]⇒12=4+F2+2F⇒F2+2F−8=0⇒(F−2)(F+4)=0⇒F=2,−4As the magnitude of force can’t be negative So,F=2N
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