Answer:
(a) 1.25 m/s to the right
(b) 3.75 m/s
Step-by-step explanation:
a) Average velocity is the change in displacement divided by the change in time. Velocity is described by magnitude and direction.
(+20 -10)/(5 +3) = (+10)/8 = +1.25 . . . meters per second (positive is "right")
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b) Average speed is the distance covered divided by the time. There is no direction associated with speed.
(20 m +10 m)/(5 s +3 s) = (30 m)/(8 s) = 3.75 m/s
