There are two forces on the 1.5 kg box in the overhead view of the figure below but only one is shown. The figure also shows the acceleration of the box. F, = 20.0 N 30 a = 12 m/s? (a) Find the second force in unit-vector notation. |N) î + ( N) ĵ (b) Find the second force as a magnitude and direction. N, ° (counterclockwise from the +x-axis is positive)

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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.