The Movable Pulley

Q.

Find the mechanical advantage of a block and tackle system consisting $n$ number of pulleys.

1. $n^2$

2. $n$

3. $n-1$

4. $\frac{n}{2}$

Q. what is balanced and unbalanced force?

Q.

What is a movable pulley? How it is different from a fixed pulley?

Q. What is point object and extended object in simple language