Question

Two forces of magnitude $7N$ and $5N$ act on a particle at an angle $\theta$ to each other, $\theta$ can have any value. The minimum magnitude of the resultant force is

• A. $12N$
• B. $8N$
• C. $2N$
• D. $5N$

Answer 1

The correct option is C $2N$

Magnitude of resultant will be minimum when $\theta ={180}^o$ and its value $=7N-5N=2N$