Phillip walks 428 m west from his house to school at an average velocity of 1.7 m/s west. About how long does the walk take?

1. Rearrange average velocity v = d/t to solve for time: t = d / v. 2. Substitute the given values from the worked example: t = 428 m / 1.7 m/s. 3. 428 / 1.7 ≈ 251.8 s, which rounds to about 252 s. 4. 1.7 s and 428 s simply repeat one of the two given numbers without dividing them; 728 s is roughly double the correct value. 5. So Phillip's walk takes about 252 seconds. _Source: OpenStax Physics Ch 2 "Motion in One Dimension", p.68 Worked Example §2.2 Speed and Velocity_