Respuesta :

A net force is the sum of all forces acting upon an object. A net force is capable of accelerating mass.
example: if the wheels on a bike push it forward with 5 Newtons & drag is 3 Newtons then the net force is 2 Newtons, forward. 

AL2006

(10 N to the right) + (15 N to the left)  =  5 N to the left.
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