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A truck of mass 13,100 kg is acted upon by a driving force of 8900 N. The motion is opposed by a frictional force of 2230 N. Find the acceleration.

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    Force = mass x acceleration.

    Really, you need the net force. If friction works in the opposite direction, you have a net force of 8900-2230.

    Use that value in the equation for force and 13,100 kg for mass. You can then solve for acceleration in m/sec/sec also written as m/sec^2

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