A brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a force of 781 N, overcoming the force of friction between the losing player’s feet and the grass. The mass of the losing player plus equipment is 80.1 kg. The losing player is accelerating at 1.22 m/s² backward. What is the magnitude of the force of friction between the losing player’s feet and the grass? To solve this problem, draw a free-body diagram for the losing player. Then write the equation for the net force and acceleration in the horizontal direction, using variables for any unknowns. Finally, solve for the force of friction, and calculate the magnitude of the force of friction on the losing player.

College Physics
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ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
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Chapter1: Units, Trigonometry. And Vectors
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A brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a force of 781 N, overcoming the force of friction between the losing player’s feet and the grass.
The mass of the losing player plus equipment is 80.1 kg. The losing player is accelerating at 1.22 m/s² backward. What is the magnitude of the force of friction between the losing player’s feet and the grass?
To solve this problem, draw a free-body diagram for the losing player. Then write the equation for the net force and acceleration in the horizontal direction, using variables for any unknowns. Finally, solve
for the force of friction, and calculate the magnitude of the force of friction on the losing player.

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