If a girl is running along a straight path with a uniform velocity of 1.5 m/s, her acceleration would be zero.
Acceleration is defined as the rate of change of velocity with respect to time. In this case, since the girl is running with a constant velocity of 1.5 m/s, there is no change in her velocity over time. Thus, her acceleration is zero.
Mathematically, we can represent this as:
a = (Δv) / Δt
where: a = acceleration Δv = change in velocity Δt = change in time
Since there is no change in velocity (Δv = 0) over any time interval (Δt), the acceleration is zero (a = 0).
Therefore, the girl's acceleration is zero when she is running along a straight path with a uniform velocity of 1.5 m/s.