Explanation:
It is given that,
Force on grindstone, F = 180 N
Radius of grindstone, r = 0.28 m
Mass of grindstone, m = 75 kg
We need to find the angular acceleration of the grindstone. In rotational motion, the relation between the torque and angular acceleration is given by :
I is the moment of inertia of solid disk,
is the torque exerted,
So, the angular acceleration of the disk is . Hence, this is the required solution.