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Circular kinematics problems

Free notes · JEE Main Physics

Formulas

θ=ω0t+12αt2\theta = \omega_0 t + \tfrac12 \alpha t^2

Rotational kinematics

Worked example

A disc's angular position is θ = 2t² rad. Find its angular velocity at t = 3 s.

  1. ω = dθ/dt = 4t.
  2. At t = 3: ω = 12 rad/s.

Answer: 12