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AP Physics C: Mechanics
2.9 Resistive Forces
AdvancedMCQMathematicalConceptual16.2k
A rectangular block of mass \(m\) rests on a horizontal line representing a flat surface. A horizontal arrow pointing to the right labeled \(v_0\) originates from the right edge of the block. A horizontal arrow pointing to the left labeled \(F_{\text{drag}}\) originates from the center of the block. A horizontal coordinate axis labeled \(x\) runs beneath the surface pointing to the right, with a vertical tick mark labeled \(x = 0\) aligned with the front edge of the block. No other labels, lines, text, or axes appear.
A block projected across a horizontal surface subject to a resistive drag force.
A block of mass \(m\) is projected with initial speed \(v_0\) across a horizontal surface at time \(t = 0\) and position \(x = 0\). The only horizontal force acting on the block is a fluid resistive force of magnitude \(F_{\text{drag}} = kv^n\), where \(k\) is a positive constant and \(n\) is a positive integer. Which of the following statements correctly characterizes the limiting behavior of the block's motion as \(t \to \infty\) for linear drag (\(n = 1\)) compared to quadratic drag (\(n = 2\))?

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