A rectangular plate of mass 20 kg is suspended from points A and B as shown. If the pin B is suddenly removed then the angular acceleration in rad/sec 2 of the plate is : (g = 10 m/s 2 ).
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
Sol. Moment of inertia about the axis rotation axis is I then,
I = I C + md 2 , where d 2 = 
+ 
= 
∴ I = 
[(0.2) 2 + (0.15) 2 ] + 
= 0.416 kg-m 2 Now I α = mg 
⇒ α = 
≈ 48 rad/sec
2
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