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:
Physics formula for speed. The math formula for speed is distance divided by time. Or simply put, the average speed or how fast something is moving is the distance it has travelled divided by the time it takes to travel.he math formula for speed is distance divided by time. Or simply put, the average speed or how fast something is moving is the distance it has travelled divided by the time it takes to travel.