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JEE Main 2003 (AIEEE) · Equilibrium, Third Law & Frames

Equilibrium, Third Law & Frames question from JEE Main 2003 (AIEEE)

Q23JEE Main 2003 · AIEEEEasy

Equilibrium, Third Law & Frames

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

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Answer: (d)

  1. The forces are AB⃗,BC⃗,CA⃗\vec{AB}, \vec{BC}, \vec{CA}, taken in order around the triangle.
  2. AB⃗+BC⃗+CA⃗=0\vec{AB} + \vec{BC} + \vec{CA} = 0, so the net force is zero.
  3. Zero net force means zero acceleration, so the velocity does not change.
  4. So the answer is (d) v⃗\vec{v} remaining unchanged.
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