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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
9 months ago

Answers : (1)

Arun
13867 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)
9 months ago
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