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AP Physics 1
2.7 Kinetic and Static Friction
2.5 Newton’s Second Law
1.3 Representing Motion
Multi-Unit
AdvancedMCQGraphicalMathematicalConceptual16k
A velocity-time graph with velocity v in meters per second on the y-axis and time t in seconds on the x-axis. The y-axis ranges from 0 to 6 with labels at 0, 2, 4, and 6. The x-axis ranges from 0 to 6 with labels at 0, 2, 4, and 6. The graph consists of three line segments: a linear increase from (0,0) to (2,4), a horizontal line from (2,4) to (4,4), and a linear decrease from (4,4) to (6,0).
Velocity vs. Time graph for the 2.0 kg block.
A block of mass \(2.0 \text{ kg}\) is pulled across a rough horizontal surface by an external horizontal force of magnitude \(F_{app}\). The coefficient of kinetic friction between the block and the surface is \(\mu_k = 0.2\). The velocity of the block as a function of time is shown in the graph below.

Which of the following tables correctly identifies the magnitude of the applied force \(F_{app}\) during the time intervals \(0\text{--}2 \text{ s}\) and \(2\text{--}4 \text{ s}\)?

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