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Answer:
Left and right: two forces
Total: four forces
Explanation:
If it's just the forces that they are using it would be two the force of each person's hand on the other. However there is also gravity pulling down on their hand but they use another force to pull it up which you can call the normal force.
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Answer:
The answer is A, if im not mistaken
The property of potential energy that distinguishes it from kinetic energy are Shape and position