A block that turns a wheel

A $0.80\ \text{kg}$ block hangs from a string wound round a wheel of radius $0.10\ \text{m}$. The heavier the wheel turns, the slower the block falls. You will make the program find the block's acceleration and the string's tension for many wheels, and the wheel that halves the acceleration.

The idea. Block: $mg - T = ma$. Wheel: $TR = I\alpha = I\dfrac{a}{R}$. Together: $a = \dfrac{mg}{m + I/R^2}$.

Your tasks.

1. Work out the acceleration for every moment of inertia in I.
2. Work out the tension for every I.
3. Find the I in the list for which the acceleration is closest to $\dfrac{g}{2}$.