Civil Engineering - Applied Mechanics - Discussion

5. 

The resultant of two forces acting at right angles is 5 kgf and if they act at an angle of 60°, it is 37 kgf. The magnitudes of the forces are :

[A]. 2 kgf, 3 kgf
[B]. 3 kgf, 4 kgf
[C]. 4 kgf, 5 kgf
[D]. 5 kgf, 3 kgf.

Answer: Option B

Explanation:

No answer description available for this question.

Eeranna said: (Aug 8, 2016)  
By verification of answers.

Take p=3 kgf, q=4kgf, angle is 60°.

Find out the resultant value,

We are getting the value root 37.

Aparna Dubey said: (Oct 12, 2016)  
How to solve it? Describe.

Kanhaiya said: (Jun 21, 2017)  
How to solve this? Please tell me.

Kishor said: (Aug 8, 2017)  
First acting 90" angle then = 5^2=p^2 +Q^2.

If acting 60" then=37=p^2+q^2+2pq cos 60"=25+pq.
Then pq=12.
solve it.

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