A hockey puck slides eastward at

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A hockey puck slides eastward at 6 m/s6\,\text{m/s}. After 3 s3\,\text{s}, it is moving westward at 4 m/s4\,\text{m/s} (take east as the positive direction). Determine its acceleration. (a) +0.67 m/s2+0.67\,\text{m/s}^2 (eastward) (b) +3.3 m/s2+3.3\,\text{m/s}^2 (eastward) (c) −3.3 m/s2-3.3\,\text{m/s}^2 (westward) (d) −0.67 m/s2-0.67\,\text{m/s}^2 (westward)

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