A truck driving on a level highway is acted on by the following forces: a downward gravitational force of 52.0 kN (kilonewtons); an upward contact force due to the road of 52.0 kN; another contact force due to the road of 9.70 kN, directed east; and a drag force due to air resistance of 5.00 kN, directed west. What is the net force acting on the truck? If the net force is eastward, enter a positive value and if the net force is westward, enter a negative value.

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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.