A lift in a high building transport 12 passengers, each of mass 65 kg, through a vertical height of 150m in a time of 64s

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Newtons laws of motion

In atoms, the electron carries a negative elementary or unit charge; the proton carries a positive charge. the two types of charge are equal and opposite. in an atom of matter, an electrical charge occurs whenever the number of protons in the nucleus differs from the number of electrons surrounding that nucleus.