A 50.0 kg girl and a 100 kg boy, stand on a frictionless frozen lake at a distance 6.0 m apart. They each hold the end of a massless rope. The boy pulls on the rope with a force of 120 N and continues to exert this force until the two meet. The girl holds onto her end of the rope at all times. With what force does the girl pull on the boy? The acceleration of the boy is How far will the girl have traveled when they meet?

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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.