justin walks 20m towards his truck, then 15m back to revive his hat. and another 20m to reach his truck. find his avg velocity, if total time taken by him is 75s
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Explanation:
Velocity (v) is a vector quantity that measures displacement (or change in position, Δs) over the change in time (Δt), represented by the equation v = Δs/Δt. Speed (or rate, r) is a scalar quantity that measures the distance traveled (d) over the change in time (Δt), represented by the equation r = d/Δt.
Therefore,
Total distance=20+20+15=55m
Time=75 s
V=55/75
=11/15 m/s
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