Question

Figures I and 2 below show a meter stick,half of which is wood and half of which is steel . (steel is demser thin wood). In figure1:. the stick is pivoted at the wooden end, at O and a force F is is applied to the steel end . In figure 2, the stick is pivoted at the steel end, at O,and identical force is applied to the wooden end. (Neglect Gravity)

• A. The angular acceleration will be greter for the stick in figure 1, because the torque about O is greter than the torque about O:
• B. The angular acceleration will be greter for the stick in figure 2, because the torque about O is greter than the torque about O
• C. The angular acceleration will be greter for the stick in figure 1 because the rotational inertia about O is smaller than the rotational ineritia about O is smaller than the rotational than the inertia about O
• D. The angular acceleration will be grater for the stick in figure 2 because the rotational inertia about 'O' is smaller than rotational inertia about O.

Answer 1

The correct option is C The angular acceleration will be greter for the stick in figure 1 because the rotational inertia about O is smaller than the rotational ineritia about O is smaller than the rotational than the inertia about O

Steel is denser than wood.

$\tau =I\alpha =f\times d$

I= moment of inertia

$I\alpha r$

r=location of earn from the rotation axis.

$\therefore$ Ig figure 1 is greater.

So, $\alpha g$ figure $1$ is less.