Think about your displacement at three different times throughout your day and compare it with the distance you traveled. remember that displacement is the difference between your starting and ending points. distance is the total amount you traveled, regardless of where you started and ended. for instance, if you travel in a circle and end up back at the starting point, your displacement will be zero, but your distance will be the amount you traveled.

-- The first thing I do when I wake up is go STRAIGHT to the bathroom.   Up to that time, my displacement is equal to distance I traveled from my bed.

-- Once I'm relaxed and back in my room, dithering around and getting dressed, the distance I've traveled since I woke up is growing and growing, but my displacement is staying pretty steady, because I'm still hanging right around my bed.

-- I walk to school, walk between classes, maybe run around the track a couple times, walk to the lunchroom and back to classes, then walk home.  By dinner time, my distance traveled during the day might be 3 or 4 MILES, but my displacement is only one floor down from my bedroom to the kitchen.

-- After my homework is done, I slide back into my warm bed and turn out the light.  My displacement for the day is now zero !  The straight-line distance from the place I started to the place I finished is zero.

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

speed = 20/2 = 10 m/s