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A 1.5 kg box is initially at rest on a h...

A 1.5 kg box is initially at rest on a horizontal surface when at t =0 a horizontal force F = (1.8t) iN (With t in seconds), is applied to the box. The seconds), is applied to the box. The acceleration of the box as a function of time t is given by. (g = 10m/s 2 ) ˉ a =0 for 0≤t≤2.85 a ˉ =(1.2t−2.4) j ˉ ​ m/s 2 fort>2.85 The coefficient of kinetic friction between the box and the surface is

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