Final answer:
In MATLAB, the 'input' function is used to prompt the user to enter a value, such as the stopping time for a calculation of projectile motion.
Step-by-step explanation:
If you want to ask the person running your MATLAB program to provide a value for the stopping time of a calculation of projectile motion, you would use the command 'input'. The input function in MATLAB is designed to prompt the user to enter a value before the program continues its execution. For example, you can ask for the stopping time by using the following line of code: stoppingTime = input('Please enter the stopping time: '). This will display the message and allow the user to input a value that will be stored in the variable stoppingTime.