# Homework 1

Angmering Raceway Car Jumping Simulation with Graphical User Interface (GUI)

Angmering Raceway is a motor racing circuit on the outskirts of Angmering, West Sussex in the

United Kingdom.  Here is the Angmering Raceway website. Angmering Raceway – Oval Raceway at Angmering, West Sussex

One of the Angmering Raceway Car Jumping Competitions is in the following YouTube Video.

The objective of the car jump competition is to drive over a 7 m long (horizontally) and 1.5 m high (vertically) jump ramp and jump over 9 cars parked tightly side-by-side, approximately 1.8 m x 9 = 16.2 m long distance.

Car jumps utilize the slop of the ramp and fast speed to create a catapult effect that launch the car into the air at an angle like a catapult.  Since the slop of the ramp is fixed, the distance of the jump will be determined by the velocity of the car when it jumps off the ramp.

Car repairs can be time consuming and expensive.  Write a MATLAB App Designer app using

Graphical User Interface (GUI) to help the race driver to visualize the jump and simulate the result.

Add an Axes to show a picture of the race car in GUI when the app starts [2 pt].

Add another Axes in GUI to plot the jump ramp and parked cars in GUI when the app starts [2 pt].

# 1. The jump ramp is 7 meters long (measured horizontally) and 1.5 meters tall (measured vertically).  Create a new variable to store the jump ramp x-direction coordinates, 0 and 7 [1pt].  Create another new variable to store the jump ramp y-direction coordinates, 0 and 1.5

[1pt].

1. The tightly parked cars (for the race drivers to jump over) are 16.2 meters long and 1.5 meters high. Create a new variable to store the parked cars x-direction coordinates, 7, 7, (7+16.2), and (7+16.2) [1 pt]. Create another variable to store the parked cars y-direction coordinates, 0, 1.5, 1.5, and 0 [1 pt].

# 3. Plot the jump ramp [2 pt] and the tightly parked cars [2 pt].

1. Set XLim to [0 35] [1 pt]. Set YLim to [0 25] [1 pt].
2. Add plot title [2 pt], x-axis label [1 pt], y-axis label [1 pt], and legend [2 pt] to the plot.

Add a Label in GUI to show the race driver the current car speed in MPH [2 pt].  The label should show 0 MPH when the app starts [2 pt].

Add a speedometer Gauge in GUI to show the race car in MPH [2 pt].  The gauge should point to 0 MPH when the app starts [2 pt].

Add a start Button in GUI [2 pt] for the race driver to click to start the simulation and to start speeding up the car.  When this start Button is clicked, the app should:

1. Modify the picture of the race car to show another picture [2 pt].
2. Increment the text shown in the car speed label by 1 MPH every 0.2 seconds (200 milliseconds) [2 pt].
3. Increment the gauge value by 1 MPH every 0.2 seconds (200 milliseconds) [2 pt].

Add a Jump Button in GUI [2 pt] for the race drive to click when the car reaches the desired jump speed.  When this Jump Button is clicked, the app should:

1. Stop the car speed increment of the text shown in the car speed Label [2 pt].
2. Stop the increment of the Gauge value [2 pt].
3. Take the current car speed value in MPH from the Gauge and use the value for the simulation computation [2 pt].

# 6. Compute the initial velocity of the car in the x [2 pt] and y [2 pt] directions (vx0 and vy0).

1. Compute the time it takes for the car to reach the maximum height (vy = 0) using vy = vy0 + ay t

[2 pt].

# 9. Compute the time it takes for the car to free-fall (with zero initial velocity) from the maximum height to the ground [2 pt], using y = y0 + vy0t + ½ ay t2.

1. Compute the total flight time of the projectile [2 pt], the time it takes for the car to reach the maximum height plus the time it takes for the car to free-fall from the maximum height to the ground.
2. Use the MATLAB linspace function to generate a large array of time that starts at 0 and ends at the total fly time with 100 equally spaced time points [2 pt].

# 13. The jump ramp is 7 meters long (measured horizontally) and 1.5 meters tall (measured vertically).  Create a new variable to store the jump ramp x-direction coordinates, 0 and 7 [1pt].  Create another new variable to store the jump ramp y-direction coordinates, 0 and 1.5

[1pt].

1. The tightly parked cars (for the race drivers to jump over) are 16.2 meters long and 1.5 meters high. Create a new variable to store the parked cars x-direction coordinates, 7, 7, (7+16.2), and (7+16.2) [1 pt]. Create another variable to store the parked cars y-direction coordinates, 0, 1.5, 1.5, and 0 [1 pt].

# 17. Plot the jump ramp [2 pt], the tightly parked cars [2 pt], the bottom of the race car projectile motion [2 pt] and the top of the race car projectile motion [2 pt] in the same figure.

1. Set XLim to [0 35] [1 pt]. Set YLim to [0 25] [1 pt].
2. Add plot title [2 pt], x-axis label [1 pt], y-axis label [1 pt], and legend [2 pt] to the plot.

# 22. If the horizontal distance the race car flies above 1.5 m value is greater than 16.2 [2 pt]:

1. Modify the picture of the race car to show a successful picture [2 pt].

# 23. Else:

1. Modify the picture of the race car to show a crash picture [2 pt].
2. End.

(Here is an example display when the program starts.)

(Here is an example display after clicking the START+SPEED button.  Note that the speed goes up automatically.)

(Here is an example display showing the speed automatically goes up.)

(Here is an example clicking the JUMP button at 56 MPH.)

(Another example for clicking the JUMP button at 39 MPH.)

# Rename the hw1.zip to LastName_FirstName_ME106_hw1.zip Submit the .zip file to Moodle.

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