MHT CET Physics question

A uniform plane sheet of metal in the form of triangle ABC has BC > AB > AC. Its moment of inertia will be smallest

(A)about AC as axis
(B)about AB as axis
(C)about BC as axisCorrect
(D)with a line through C normal to its plane as axis

Answer: (C)

Solution

For a triangular sheet, the moment of inertia about a side is where is the altitude on that side; the longest side BC has the smallest altitude, hence

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-040183