Chapter 10, Problem 40A

To determine

Work done by pulley system.

Answer to Problem 40A

Work done by pulley system to lift the oven is $11.76\text{kJ}$ .

Explanation of Solution

Given:

Mass of oven is $m=150\text{kg}$

Height of house is $d=8\text{m}$

Speed is constant.

Formula used:

Work done is given by,

  $W=Fd$ ..... (1)

Calculation:

As, $F=mg$

So,

  $\begin{array}{l}W=mgd\\ =150\times 9.8\times 8\\ =11760\text{J}\\ =11.76\text{kJ}\end{array}$