(I have no idea what to do I've asked our professor for help with this numerous times he refuses please help, I know how to make input boxes and a command button but that is it)
(1) When an object is thrown into the air it exhibits what is called projectile motion. You will (or already have) studied this motion in a physics class. Equations describing this motion are shown in the table below. In these equations, t is time, x is horizontal position, y is vertical position, v is velocity, and a is acceleration. The subscripts x and y refer to velocity and acceleration in the x or y direction, and the subscript zero refers to time 0.
vx = vx0 + axt
vy = vy0 + ayt
x = x0 + t(vx0 + vx)/2
y = y0 + t(vy0 + vy)/2
x = x0 + vx0t + axt2/2
y = y0 + vy0t + ayt2/2
vx2 = vx02 + 2ax(x – x0)
vy2 = vy02 + 2ay(y – y0)
Only a subset of the equations in the table will be needed for this project; you will determine which ones you will use. In addition, vx0 = v0cos(q0) and vy0 = v0sin(q0), where v0 is the initial speed with which the object is thrown, and q0 is the angle (measured from horizontal) of the direction in which the object is thrown.
In this project, we will choose the horizontal position from which the object is thrown as the starting point, giving x0 = 0 m. Also, ignoring air resistance (drag), ax = 0 m/s2, and ay = -9.81 m/s2 (gravity acting downward). The user will specify y0, vo, and q0. The goal is to determine the time and horizontal position when the object hits the ground (y = 0 m). To accomplish this, you will create a program to do the following:
When the user clicks the command button, use a message box (NOT an input box) to allow the user to choose whether he will guess the time for the object to hit the ground or the horizontal position when the object hits the ground. You may wish to refer to the file “Message Box Response” that was discussed in class.
Use input boxes to obtain the y0, vo, and q0 and the guess value from the user. Other data whose values are given above will be assigned values and data types using the Const statement (see text).
Calculate the vertical position. If it is within 0.1 m of ground level, congratulate the user and tell him the horizontal position and time (one of which will need to be calculated). If the vertical position is not close to ground level, give the user a suitable message, indicating what qualitative change in his guess value is needed. In this case, do not use the default parameter vbOKOnly in the message box.
There are two times that conditional statements must be used in this project. Use the If/Then/Else structure one time and the Select Case code structure the other time.
Notes: Be sure that all of your communication to the user (command button, input boxes, and message boxes) is clear. As a check, when y0 = 10m, v0 = 10 m/s, and q0 = 45°, the object hits the ground at t = 2.32 s and x = 16.4 m.
it looks like we share same professor hahahah
add me on zamanei1974 messenger, maybe we could solve it
To solve this problem, you need to create a program that allows the user to input values for y0, vo, and q0, and then calculates the time and horizontal position when the object hits the ground.
Here's a step-by-step guide on how to approach this project:
1. Create the user interface:
- Create a form with input boxes for y0, vo, and q0.
- Add a command button for the user to click when they are ready to calculate the results.
2. Handle the button click event:
- Write code to handle the click event of the command button.
- In the event handler, display a message box (using the MsgBox function) to allow the user to choose whether they will guess the time or the horizontal position.
- Use the MsgBox function with vbYesNo buttons to display the message box.
- Use an If...Then statement to check the user's choice.
- If the user chooses to guess the time, proceed with calculating the time.
- If the user chooses to guess the horizontal position, proceed with calculating the horizontal position.
3. Calculate the time:
- In the event handler, after the user chooses to guess the time, use an input box to obtain the guess value from the user.
- Calculate the time using the equation y = y0 + vy0t + ayt^2/2 and solve for t when y = 0.
- Compare the calculated time to the guess value.
- If the calculated time is within a specified range (e.g., within 0.1 s of the guess value), display a message box congratulating the user and providing the horizontal position (calculate using x = x0 + t(vx0 + vx)/2) and time.
- If the calculated time is not close to the guess value, display a message box indicating what change in the guess value is needed (e.g., too high or too low). Use a suitable message that guides the user on how to modify their guess value.
4. Calculate the horizontal position:
- In the event handler, after the user chooses to guess the horizontal position, use an input box to obtain the guess value from the user.
- Calculate the horizontal position using the equation x = x0 + t(vx0 + vx)/2 and solve for x when y = 0.
- Compare the calculated horizontal position to the guess value.
- If the calculated horizontal position is within a specified range (e.g., within 0.1 m of the guess value), display a message box congratulating the user and providing the time (calculated earlier) and the horizontal position.
- If the calculated horizontal position is not close to the guess value, display a message box indicating what change in the guess value is needed (e.g., too high or too low). Use a suitable message that guides the user on how to modify their guess value.
5. Add constants and other necessary calculations:
- Add constants to the code for ax, ay, and x0.
- Calculate vx0 = vo * cos(q0) and vy0 = vo * sin(q0) using the given formulas.
- Use these calculated values along with the constants to perform the required calculations.
6. Test the program:
- Run the program and input different values for y0, vo, and q0 to test if the program provides the correct results.
- Use the provided values for y0 = 10m, vo = 10 m/s, and q0 = 45° to check if the program gives t = 2.32 s and x = 16.4 m.
Remember to break down the problem into smaller steps and write code accordingly. Also, make sure to add error handling and suitable messages for user interaction throughout the program. Good luck!