A 1.5 kg box is initially at rest on a horizontal surface when at t 0 a horizontal force

Chapter 6, Problem 93

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A 1.5 kg box is initially at rest on a horizontal surface when at t 0 a horizontal force (with t in seconds) is applied to the box. The acceleration of the box as a function of time t is given by for 0 t 2.8 s and for t 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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