For the displacement-versus-time graph shown in the original figure, consider: A) average velocity from 0 to 3 s is 10 m/s; B) average velocity from 3 to 5 s is 0 m/s; C) instantaneous velocity at t = 2 s is 5 m/s; D) average velocity from 5 to 7 s equals instantaneous velocity at t = 6.5 s; E) average velocity from 0 to 9 s is zero. Choose the correct set.

Question

G1 Physics · Accepted Answer

Velocity is obtained from the slope of a displacement-time graph, while average velocity is total displacement divided by the corresponding time interval. From t = 3 s to t = 5 s the graph is horizontal, so displacement does not change. Hence average velocity is 0 m/s. Statement B is true. At t = 2 s the graph lies on a straight rising segment whose slope is 5 m/s. Hence statement C is true. The displacement at t = 9 s is the same as at t = 0, so the net displacement over 0–9 s is zero. Hence t…