For an 8 s interval

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

Problem

For an 8 s interval, an object’s velocity–time graph is described as follows: • From t = 0 s to t = 2 s the velocity is constant at +4 m/s. • From t = 2 s to t = 6 s the velocity decreases uniformly to –4 m/s. • From t = 6 s to t = 8 s the velocity remains constant at –4 m/s. What is the object’s average velocity over the entire 8 s interval? (a) +2 m/s+2\ \text{m/s} (b) 0 m/s0\ \text{m/s} (c) −1 m/s-1\ \text{m/s} (d) +1 m/s+1\ \text{m/s}

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