Draw a velocity graph with vi = 4 m/s and decreasing uniformly so that velocity at 2 seconds is 2 m/s and remaining constant from 2 to 4 seconds. now, draw the acceleration graph for the velocities described above.

For the velocity graph: start at 0s and 4m/s and draw a straight line to 2s and 2 m/s. Then draw a straight horizontal line to 4s and 2m/s

For the acceleration graph: start with a horizontal line from 0s and 2m/s/s to 2s and 2m/s/s. The draw another line from 2 s and 0m/s/s to 4 s and 0m/s/s

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s