Objects with masses  m1 = 12.0 kg  and  m2 = 9.0 kg  are connected by a light string that passes over a frictionless pulley as in the figure below. If, when the system starts from rest, m2 falls 1.00 m in 1.45 s, determine the coefficient of kinetic friction between m1 and the table.

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.