A box of mass 10.2 kg is slid along the floor. The initial speed of the box is 2.5 m/s and it comes to rest after 8.1 m. What was the magnitude of the force of friction acting on the box during this motion? You must enter you answer and include the SI units. (For example: 3.0kg)

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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: