Screw Jack vs. 2 strand Pulley sytem?

Question

How can I calculate the amount of input force I would need with each turn of the handle and the total amount of force to raise the books with the distance of 20 cm.
the handle has a circumference of 150 cm., the pitch is 2 cm. and the books weigh 10 kg.
would it be F=2pir or W*P/2pir
If i used a pulley system using the same books which one of these machines will have greatest mechanical advantage.

Answer 1

The easy question to answer is that the screw jack would have an overwhelmingly greater mechanical advantage than a simple 2 strand pulley system which has an advantage of 2 (where the rope goes down to a moving pulley attached to the weight). It is almost impossible to build a screw jack with that small a mechanical advantage.
The problem with giving you an answer about the formula is that you don't define what your symbols (F p i r P W) mean.