## Projectile Mathematics - Directions

### How it Works:

Using the Projectile Mathematics Concept Builder is quite simple. You will be presented with an introductory sentence and a table of numerical values associated with a collision. Some cells of the table are blank and you will have to use F∆t = m•∆v to solve for the blank cells. You can consider each row of the table as a separate problem. Only information from that row can be used to determine the unknown values. One row is not dependent upon other rows.

The Concept Builder keeps track of the number of misses. A miss is considered any value that is entered into a cell and evaluated as incorrect. If a cell value is incorrect on the first attempt and if not changed nor deleted, it would be marked as a miss on the second attempt. If you do not wish to check that incorrect value again, then you would have to remove the value (tap on the cell to open the Number Pad and tap on the C​ or Clear button) before the next time that you check your answers.

Once all table cells are accurately completed, your Health Percent is shown. The Health Percent is based upon the number of misses. The formulas for calculating this are:

Apprentice Difficulty Level:  Health Percent = 100 - 3*Number of Misses

Master Difficulty Level:  Health Percent = 100 - 2*Number of Misses

Wizard Difficulty Level:  Health Percent = 100 - 2*Number of Misses

Your Health Percent is displayed on the Main Menu. If you wish to repeat the Difficulty Level to improve your Health Percent, you can tap on the provided button to do so. Your best Health Percent is always displayed on the Main Menu. If you repeat a difficulty level and do worse the second time, it is the best Percent that will be displayed.

### Getting Help

Thanks for being patient with the Directions. Happy learning!