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

Answer: (D)

$\overrightarrow{v}$ remaining unchanged

Applying triangle law for $F_{resultant}$

$\overrightarrow{F_{net}}=0$
$\therefore {\overrightarrow{v}}_{constant}$