Q 11-03-016NEETJEE MainEasy
The greatest and least resultants of two forces acting at a point are $17$ N and $7$ N. The magnitude of their resultant when they act at right angles is
Answer: (A) $13$ N
$A + B = 17$ and $A - B = 7$, so $A = 12$ N and $B = 5$ N.
$$R = \sqrt{12^2 + 5^2} = 13\ \text{N}$$
Solution by Sreeraj P, M.Sc Physics