A block, mass 20.0 kg is being pulled horizontally along a rough surface. The box experiences an acceleration of 2.50 m/s²[fwd] and the coefficient of kinetic friction between the surface and the block is 0.555. What is the magnitude of the normal force acting on the box as it is moving with this acceleration?  a) 109 N   b) 159 N   c) 196 N   d) 246 N

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Newton's Second Law

Newton’s laws of motion describe the relationship between the motion of an object and forces acting on it. Newton’s law of motion has two types as follows: