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Sum

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).

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#### Solution

**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

Concept: Projectile Motion

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