Two teams, Team A and Team B, are involved in a tug of war. Over a period of 10.

Question

Two teams, Team A and Team B, are involved in a tug of war. Over a
period of 10.0 seconds, the teams (and the rope) move back and forth several times. During this movement, the rope
remains stretched taut, and the team members all maintain the same positions relative to the rope. The rope is fairly
sturdy, so its mass cannot be ignored. Also, assume the rope exerts forces on the two teams which are purely in the
horizontal direction, and that the tug-of-war takes place on level ground. Which of the following statements must be
true throughout the entire 10.0 second period?

(a) The magnitude of the frictional force exerted on Team A by the ground is equal to the magnitude of the frictional
force exerted on Team B by the ground.
(b) The magnitude of the force exerted on the rope by Team A is equal to the magnitude of the force exerted on the
rope by Team B.
(c) The acceleration of Team A is equal to the acceleration of Team B.
(d) The magnitude of the force exerted on the rope by Team A is equal to the magnitude of the force exerted on Team
A by the rope.
(e) The magnitude of the force exerted on Team B by the rope is equal to the magnitude of the frictional force exerted
on Team B by the ground.
2

Explanation / Answer

statements a,b,c and d are wrong because the rope keep moving back and forth. e is true because directions are always opposite but the magnitudes are always same

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