Broken or bruised ribs. Introduction. Broken (fractured) or bruised ribs are usually caused by a fall or blow to the chest, or occasionally by severe coughing. They can be very painful, but will normally improve within about three to six weeks. If you think you've injured your ribs, you'll often be able to look after yourself at home.
The average speed of an object is defined as the distance traveled divided by the time elapsed. Velocity is a vector quantity, and average velocity can be defined as the displacement divided by the time. For the special case of straight line motion in the x direction, the average velocity takes the form:
Best Answer: Average velocity is total displacement/time and includes direction. Average speed is just the distance you covered/time it took. Lets say I was on a football field and ran from the 50 yard line, to the goal line, and then back to the 40 yard line, all in a time of 10 seconds.