Question

In a tug of war match, team A displaces team B by 30 cm from the reference line. The forces applied by team A and B are 150 N and 120 N respectively. Calculate the energy spent by team A.

• A. 400 J
• B. 45 J
• C. 500 J
• D. 36 J

Answer 1

The correct option is B 45 J

Given:
In a tug of war match, team A displaces team B by 30 cm i.e 0.3 m from the reference line.
Force applied by team A = 150 N
Force applied by team B = 120 N
Here we are asked to calculate energy spent by team A which will be equal to work done by team A in displacing team B.
Therefore work done by team A in displacing team B = force applied on team B by team A x displacement of team B
= $150\times 0.3$
= 45 J
Hence, the energy spent by team A = 45 J