A girl walks from x = -4 m to x = -11 m in 5 seconds. What is her average velocity?
Question
A girl walks from x = -4 m to x = -11 m in 5 seconds. What is her average velocity?
Solution
The average velocity can be calculated using the formula:
v = Δx / Δt
where: v is the average velocity, Δx is the change in position (final position - initial position), and Δt is the change in time.
In this case, the final position is x = -11 m, the initial position is x = -4 m, and the time is 5 seconds.
So, Δx = -11 m - (-4 m) = -7 m.
Therefore, the average velocity is:
v = Δx / Δt = -7 m / 5 s = -1.4 m/s.
The negative sign indicates that the girl is moving in the negative x direction.
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