m. m2 A mass m1 = 12.0 kg sits on a level tabletop, and is attached to a second hanging mass m2 by a rope draped over a frictionless pulley. The coefficient of static friction between the 12.0-kg block and the tabletop is 0.450. What is the minimum mass m2 needed so that the 12.0-kg block will just begin to slide? 5.40 kg 10.8 kg 12.0 kg 14.5 kg

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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.