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Angular acceleration

Free notes · JEE Main Physics

Formulas

ω=ω0+αt,θ=ω0t+12αt2\omega = \omega_0 + \alpha t,\quad \theta = \omega_0 t + \tfrac{1}{2}\alpha t^2

Rotational equations of motion

Worked example

In uniform circular motion, the acceleration of the particle is directed:

  1. Speed is constant but velocity direction changes continuously.
  2. The change in velocity points toward the centre → centripetal acceleration a_c = v²/r toward the centre.

Answer: Toward the centre of the circle