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Grade: 12th pass
        Two forces are acting at an angle 120 deg. The bigger force is 40N and the resultant is perpendicular to the smaller one. The smaller force is
one year ago

Answers : (1)

Arun
20891 Points
							
Dear Rohit
 
Answer is 20 N
 
Solution-
Tan (α) = psin (θ)/p + qcos (θ).
Alpha = 90, tan90 = 1/0.
θ = 120 = 180 - 120 = 60, sin60 = root3/2.
Cos60 = 1/2.
1/0 = p (root3/2)/p-40 (1/2).
P = 20.

Because cos (180-θ) = -cos (θ).
 
 
Regards
Arun (askIITians forum expert)
one year ago
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