A block is pushed across a floor by a constant force that is applied at downward angle u (Fig. 6-19). Figure 6-36 gives the ac-
physicsproblem
Question
A block is pushed across a floor by a constant force that
is applied at downward angle u (Fig. 6-19). Figure 6-36 gives the ac-
celeration magnitude a versus a range of values for the coefficient
of kinetic friction m k between block and floor: a 1 ϭ 3.0 m/s 2 , m k2 ϭ
0.20, and m k3 ϭ 0.40. What is the value of u?
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