Answer:
Step-by-step explanation:im not good at long answers but it should push each other away.
Potential Energy: the energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors.Compare with kinetic energy
Friction :the action of one surface or object rubbing against another.
plz dont sue me if Im wrong
Step-by-step explanation:
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The standard form of the equation of a circle is:

Where the point (a,b) represents the centre and r is the radius. So, given your information, the equation will be: