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JEE Main 2005
Exam
JEE Main
Year
2005
Subject
Physics
Chapter
Motion in Two Dimensions

JEE Main 2005 · Physics · Motion in Two Dimensions

A particle is projected from a point O with velocity u at an angle...

A particle is projected from a point O\mathrm{O} with velocity uu at an angle of 60∘60^{\circ} with the horizontal. When it is moving in a direction at right angles to its direction at OO, its velocity then is given byA particle is projected from a point O with velocity u at an angle of 60^ with the horizontal. When it is moving in aA particle is projected from a point O with velocity u at an angle of 60^ with the horizontal. When it is moving in a

Options

  1. Au3\frac{u}{3}
  2. Bu2\frac{\mathrm{u}}{2}
  3. C2u3\frac{2 u}{3}
  4. Du3\frac{\mathrm{u}}{\sqrt{3}}

Correct answer

D. u3\frac{\mathrm{u}}{\sqrt{3}}

Step-by-step solution

A particle is projected from a point O with velocity u at an angle of 60^ with the horizontal. When it is moving in a
ucos⁡60∘=vcos⁡30∘\mathrm{u} \cos 60^{{}^{\circ}}=\mathrm{v} \cos 30^{{}^{\circ}} v=43\frac{4}{\sqrt{3}}
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