A triangular plate of uniform thickness and density is made to rotate about an axis perpendicular to the plane of the paper and
(i) passing through `A`,
(ii) passing through `B`, by the application of some force `F` at `C` (mid - point AB) as shown in the figure. In which case angular acceleration is more ?
.

Options

A. In case (i)
B. In case (ii)
C. Both (i) and (ii)
D. None of these

Answer

B

Explanation

(b) We can see that torque in both cases is `FL//2`. But in case (ii) moment of inertia is less. So angular acceleration is more in case (ii).