Question

In Fig. (i), a metre stick, half of which is wood and the other half steel is pivoted at the wooden end at $a^{{}^{\prime }}$ and a Force F is applied to the steel end a. In Fig(ii) the stick is pivoted at the steel end at a and the same force F is applied at the wooden end at $a^{{}^{\prime }}$. The angular acceleration

• A. In (i) is greater than in (ii)
• B. In (ii) is greater than in (i)
• C. Is equal both in (i) and (ii)
• D. None of the above

Answer 1

The correct option is B In (ii) is greater than in (i)

Moment of inertia in case ii is less implying it will gain more angular velocity using the principle of conservation of angular momentum.Thus its acceleration would be more.