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Answers. Best Answer: The two objects are neutral to start with because they have an equal number of protons (positively charged) and electrons (negatively charged). When they are rubbed together, some of the electrons from one object are transfered to the other. This means that one object will have more electrons than protons, and thus have a negative charge, while the other will have more protons than electrons, and therefore a positive charge. Source(s):
The friction is acting opposite to the ball rolling in the ground. Friction is a force that resists motion. It always acts in the opposite direction to the motion. Friction is caused by bumps on the two surfaces(whic are in contact), rubbing as they slide across each other. Friction means that objects slow down and lose kinetic energy.