Civil Engineering - Applied Mechanics - Discussion

4. 

Two forces of 6 Newtons and 8 Newtons which are acting at right angles to each other, will have a resultant of

[A]. 5 Newtons
[B]. 8 Newtons
[C]. 10 Newtons
[D]. 12 Newtons.

Answer: Option C

Explanation:

No answer description available for this question.

Shilpa said: (Jul 18, 2015)  
Resultant R = sqrt(A2+B2).

A = 6.
B = 8 substitute A, B.
R = sqrt(100).
R = 10 N.

Hari Prasanna said: (May 18, 2016)  
P = 6.
Q = 8.

R = (P^2 + Q^2 + 2PQ cosa)^1/2.
(where 'a' is the angle between the forces 'P' and 'Q').

So,
R = (36 + 64 = 2 * 6 * 8 * cos90)^1/2.

Then, R = 10.

Eeranna said: (Aug 7, 2016)  
The above explanations are correct. Thanks.

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