Along a straight track

PHYSICS · Single correct · AP · Physics 1: Algebra-based · Kinematics · Kinematics

Problem

Along a straight track, the positive xx-axis is taken toward the east. A ball rolls such that its position decreases uniformly with time. Which option correctly states the sign of its velocity and the nature of its speed? (a) Velocity positive, speed positive\text{Velocity positive, speed positive} (b) Velocity negative, speed positive\text{Velocity negative, speed positive} (c) Velocity negative, speed negative\text{Velocity negative, speed negative} (d) Velocity zero, speed zero\text{Velocity zero, speed zero}

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