In first figure a meter stick, half of which is wood and the other half steel is pivoted at the wooden end at `A` and a force is applied at the steel and at `O`. On second figure the stick is pivoted at the steel end at `O` and the same force is applied at the wooden end at `A`. The angular acceleration.
.

Options

A. in first is greater than in second
B. equal in both first and second
C. in second is greater than in first
D. None of the above.

Answer

C

Explanation

( c) Torque will be same in both cases, but moment of inertia is less in second case, hence angular acceleration is greater in this case.