AP Physics 1mediummcq1 pt
A 3.0 kg block is dragged across a floor where μ_k = 0.30 by a horizontal force (g = 10 m/s²). The force needed for constant velocity is
A.9.0 N
B.30 N
C.90 N
D.0.9 N
Explanation
Core Concept
At constant velocity, F = μ_kN = (0.30)(3.0)(10) = 9.0 N.
Correct Answer
A9.0 N
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