One topic commonly studied in physics is velocity. This application models the action of a ball that is tossed into the air at a certain velocity. The formula used in the application, h(t) = 96 - 16t² , shows the relationship between the height of a ball at time, t, and its velocity.

You will note that the formula is quadratic, so when you solve the formula, you will have two solutions. Both solutions are meaningful and can be interpreted by tracing the path the ball takes from the ground into the air and back to the ground.

Try working each problem with paper and pencil and then use the interactive application to check your work. Make sure you answer the question that you are asked; the application solves specifically for the time it takes the ball to reach a given height on its way back down to the ground. Click on the "play" button and enter the appropriate values in the speed (velocity) and height boxes. Then click on the "run" button to see the changes in height at any given point in time. Hit the "reset" button to enter new values. After entering new values, you may have to hit the "enter" key to refresh the application.

In some cases, your answer may not exactly match that in the interactive application. The application rounds decimal values to the nearest tenth.