Question

1. a ball rolls across a smooth surface at a steady 0.5 miles per hour (mph). what is its acceleration?

0
9.8 m/s^2
0.5 m/s
2 m/s^2

Explanation:

Step1: Recall Acceleration Definition

Acceleration is the rate of change of velocity. Formula: $a = \frac{\Delta v}{\Delta t}$, where $\Delta v$ is change in velocity, $\Delta t$ is time interval.

Step2: Analyze Velocity Change

The ball moves at a steady (constant) speed of 0.5 MPH. So $\Delta v = 0$ (no change in velocity).

Step3: Calculate Acceleration

Substitute $\Delta v = 0$ into $a = \frac{\Delta v}{\Delta t}$. Then $a = \frac{0}{\Delta t} = 0$.

Answer:

0 (the first option with value 0)