Question

Three forces start acting simultaneously on a particle moving with velocity $\overrightarrow{V}$ . These forces are represented in magnitude and direction by the three sides of a triangle ABC(as shown). The particle will now move with velocity :

• A. less than $\overrightarrow{V}$
• B. greater than $\overrightarrow{V}$
• C. $\left|V\right|$ in the direction of the largest force BC
• D. $\overrightarrow{V}$ remaining unchanged.

Answer 1

The correct option is D $\overrightarrow{V}$ remaining unchanged.

According to triangle law of vector addition if three vectors are represented by three sides of a triangle taken in same order, then their resultant is zero.Therefore resultant of the forces acting on the particle is zero, so the particles velocity remains unchanged.