Description

Average acceleration is defined as the change of velocity divided by the time taken to make the change.

Part $1--$Variables:

Create a new class AverageAcceleration with a main method.

in the main method, Create a scanner

Scanner input $=$ new Scanner$($System$.$in$)$;

Ask the user to enter a starting velocity, an ending velocity, and time $.$ All $3$ are doubles. store them in $3$ variables

Enter starting velocity in meters $/$ second;

Enter ending velocity in meters $/$ second:

Enter the time in seconds:

create a double acceleration variable for the calculation

acceleration $=($v$1-$ v$0)/$t

Print out the $3$ variables

Print the acceleration formatted this way$($See Example output below$)$:

The average acceleration is $10\mathrm{.}088888888888889$ meters $/$ second.

Run the program

Part $2--$Conditionals:

Use one condition with one if$-$else statement to display an error if any of the entered data for starting velocity, ending velocity, and$/$or time is less than $0$; else compute and display the average acceleration.

if the data is invalid print the following message:

Invalid data. Please check data entered.

move the acceleration calculation to the else.

Run the program...verify that the if prints the expected invalid statement.

Part $3--$Loops:

Let's create a loop around the current code that will allow us to ask and run acceleration calculations until the user quits

which loop should we use?

Ask the user after the first loop if they want to enter another password

Would you like to enter another calculation? enter Y for yes

Run the program

Part $4--$Arrays$/$ArrayList:

Collect the calculated accelerations in an ArrayList

after the loop that ask for User input and does the calculation, create another loop to iterate thru the acceleration ArrayList

move the print out into the new loop and update it to use the ArrayList to print the values$($See Example output below$)$:

The average acceleration is $17\mathrm{.}142857142857142$ meters $/$ second.

The average acceleration is $10\mathrm{.}088888888888889$ meters $/$ second.

Run the program

Part $5--$Methods:

Our code is starting to get a little messy

create a method calculateAcceleration

parameters: double startVelocity, double endVelocity, double time

return: Double. Note: if the User input is Invalid data, then return null.

move the if$/$else code into the method. The adding to the ArrayList should stay in the main method.

In the main method, update the code to use the calculateAcceleration method. Note: if the method returns null, then do not add it to the ArrayList

Run the program

Example output:

Sample Run $($user$-$entered data in red$)$

Enter starting velocity in meters $/$ second: $5\mathrm{.}5$

Enter ending velocity in meters $/$ second: $50\mathrm{.}9$

Enter the time in seconds: $4\mathrm{.}5$

Would you like to enter another calculation? enter Y for yes N

The average acceleration is $10\mathrm{.}088888888888889$ meters $/$ second.