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Statement of a problem № 2479

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As shown in Fig. 3-9, a force of 400 N pushes on a 25-kg box. Starting from rest, the box achieves a velocity of 2.0 m/s in a time of 4.0 s. Find the coefficient of kinetic friction between box and floor.

Solution:
As shown in Fig. 3-9, a force of 400 N pushes on a 25-kg box. Starting from rest

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