Question

An object of mass m has angular acceleration α = 0.2 rad s^-2. What is the angular displacement covered by the object after 3 seconds? (Assume that the object started with angle zero with zero angular velocity).

Answer 1

Given,

Angular acceleration = α = 0.2 rad s^-2

Time = 3s

Initial velocity = 0

Solution:

θ = `ω_0t + 1/2αt^2`

θ = `1/2 xx 0.2 xx 3^2 = 0.9` rad (or) 51°54