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. $\overrightarrow{v}$, remaining unchanged
• B. Less than $\overrightarrow{v}$
• C. Greater than $\overrightarrow{v}$
• D. |v| in the direction of the largest force BC.

Answer 1

Answer: (A)

$\overrightarrow{v}$, remaining unchanged

Answer 2

$\begin{matrix} \overset{\rightarrow}{F_{1}} + \overset{\rightarrow}{F_{2}} + \overset{\rightarrow}{F_{3}} = 0 \end{matrix}$ so

velocity v = constant