Question

If two people are pulling a box in the same direction with 85 N and 65 N force and the net displacement of the box is 18 m, then the net work done is _____.

• A. 2700 J
• B. 2800 J
• C. 1900 J
• D. 1250 J

Answer 1

The correct option is A

2700 J

Let
Force applied by first person be, $F_1=85N$
Force applied by second person be, $F_2=65N$.
Given:
Displacement, $s=18m$
Since, both the forces are acting in the same direction, net force$=85+65=150N$
$\therefore$ Net work done W is given by
W $=$ Net force$\times$displacement
W$=150\times 18=2700J$
The net work done is $2700J$.