Q3 of 8 Page 178

The moment of inertia of a triangular lamina of mass M and height h about its base is

Given,

Mass of triangular lamina = M


Height of triangular lamina = h


Let, b = base of the triangle


Area of the triangle = A



Since it’s not mentioned we will consider this as a uniform triangular lamina that means mass is uniformly distributed throughout the lamina.


Mass per unit area = σ





Let, moment of inertia of the lamina about its base = I



x is distance of small strip of thickness and height b.












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