Question

A man uses a pulley system to slow down the falling of a box. Find the acceleration of the box. Given that the mass of the box is 7 kg and the weight is 5 kg and the string is inextensible.

Answer 1

The acceleration of a simple pulley system is

$$a=g\frac{M-m}{M+m}=1.63\text{ m/s}^2.$$