7. A man runs around a circular track of 800 meters radius for 30 seconds, starting at a point directly to the right of the center and goes in a counterclockwise manner. He goes 5 meters per second for the first 15 seconds, runs 90 meters for the next 6 seconds and then 180 meters for the rest of the course. (a) What was his average speed? (b) What was his average velocity? (c) What was his displacement from the starting point? (d) What wll be hls total displacement upon returning to the startlng polnt.

7. A man runs around a circular track of 800 meters radius for 30 seconds, starting at a point directly to the right of the center and goes in a counterclockwise manner. He goes 5 meters per second for the first 15 seconds, runs 90 meters for the next 6 seconds and then 180 meters for the rest of the course. (a) What was his average speed? (b) What was his average velocity? (c) What was his displacement from the starting point? (d) What wll be hls total displacement upon returning to the startlng polnt.