Question

If a girl is running along a straight road with a uniform velocity 1.5m/s, find her acceleration.​

Answer 1

Explanation:

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Acceleration is zero because the girl is running with constant velocity.

Answer 2

Answer:

As she maintains a steady velocity along a straight (and level?) road, she has zero acceleration along the road.

However, she has to move her legs in order to run, so probably her center of gravity rises a little and falls a little at each step. If this is the case, if you attach an accelerometer to her, it will measure a small cyclic acceleration in the vertical direction.