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KCET2025PhysicsMotion in Two Dimensions

A particle is in uniform circular motion. The equation of its trajectory is given by (x-2)^2+y^2=25 , where x and y are in meter. The speed of the particle is 2 ~ms ⁻¹ , when the particle attains the lowest ' y ' co-ordinate, the acceleration of the particle is (in ms ⁻² )

Options

  1. A0.4 j
  2. B0.8 i
  3. C0.8 j
  4. D0.4 i

Correct answer

C. 0.8 j

Step-by-step solution

(x-2)^2+y^2=25 Equation of circle center (2,0) aligned & r^2=25 & r=5 & a_c= v^2 R = 2^2 5 & =0.8 ~m / s ^2 & a _ c =0.8 i ~m / s ^2 aligned

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