A 1.0 kg box is initially at rest on a horizontal surface when at t = 0 a horizontal force F = (2.1t )i N (witht in seconds) is applied to the box. The acceleration of the box as a function of time t is given by a = 0 for 0 2.8 s. (a) What is the coefficient of static friction between the box and the surface? (b) What is the coefficient of kinetic friction between the box and the surface?

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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: