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Grade: 11
        
Caculate the mass of inertia about an axis with an angle of 30 of a massless string.
17 days ago

Answers : (1)

Vikas TU
6930 Points
							
Moment of inertia is the sum of total moment of inertia of all particles along MN axis.
and it is defined as the product of masses with the square of perpendicular distances of masses to the line MN.
Therefore,
net MOI = m*(Lsin30)^2 + 2m*(Lsin60)^2 + 3m*(Lcos30)^2 + 4m*(Ltan30)^2 
            = mL^2/4 + 3mL^2/2 + 9mL^2/4 + 4mL^2/3
           = 11ml^2/2.
11 days ago
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