Three people pull simultaneously on a stubborn donkey. Jack pulls directly ahead of the donkey with a force of 77.9 N77.9 N , Jill pulls with 87.1 N87.1 N in a direction 45° to the left, and Jane pulls in a direction 45° to the right with 119 N119 N . (Since the donkey is involved with such uncoordinated people, who can blame it for being stubborn?) Find the magnitude of the net force the people exert on the donkey. magnitude of the net force:   NN What is the direction of the net force? Express this as the angle from straight ahead between 0° and 90°, with a positive sign for angles to the left and a negative sign for angles to the right. direction of the net force:

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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.