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Questions  >>  JEEMAIN and NEET  >>  Physics  >>  Class11
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Q)

A particle moves in xy plane. The position vector of particle at any time t is r={(2t)i+(2t2)j}m. The rate of change of θ at time t=2 seconds is ( θ is the angle which its velocity vector makes with positive x-axis )

(a)217rad/s(b)114rad/s(c)47rad/s(d)65rad/s
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