Q172 / 225 · JEE Main 2003 · Physics

Three forces start acting simultaneously on a particle moving with velocity, $\overrightarrow{\mathrm{v}}$. These forces are represented in magnitude and direction by the three sides of a triangle $\mathrm{ABC}$. The particle will now move with velocity Figure

  • A
    less than $\overrightarrow{\mathrm{v}}$
  • B
    greater than $\overrightarrow{\mathrm{v}}$
  • C
    $|\mathrm{v}|$ in the direction of the largest force $\mathrm{BC}$
  • Correct answer
    D
    $\overrightarrow{\mathrm{v}}$, remaining unchanged

Solution

According to triangle law of forces, the resultant force is zero. In presence of zero external force, there is no change in velocity

Hence, the correct answer is option: 'D'.

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