The quantitative measure of the inertia of rotational motion is called . .​

The quantitative measure of the inertia of rotational motion is called moment of intertia.

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this