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Question

In a tug of war, the team that exerts a larger tangential force on the ground wins, winning team not moving. Consider the period in which a team is dragging the opposite team by applying a larger tangential force on the ground. Which of the following work is negative?

A
work by the ground on the winning team.
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B
work done by string on the winning team.
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C
work by ground on the losing team.
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D
total external work on the two teams.
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Solution

The correct option is C work by ground on the losing team.

Displacement of losing team is toward wining team, because wining team pulls losing team.

Friction force by ground on losing team is opposite to their displacement.

Hence, work done by ground on loosing team is negative.


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