Tamil Nadu Board of Secondary EducationHSC Science Class 11th

# 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 - Physics

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).

#### 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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