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# Homework #2 | |
## due 2/3/17 | |
1. Now that you have created your own repository, 'homework_1', that has a README.md file. | |
Create a new file in this repository called `setdefaults.m`. This file is a matlab/octave | |
script that will set default plotting parameters. In this file, add the following lines: | |
```matlab | |
set(0, 'defaultAxesFontSize', 16) | |
set(0,'defaultTextFontSize',14) | |
set(0,'defaultLineLineWidth',3) | |
``` | |
Commit the changes to your repository. | |
![projectile(v_mag,theta) predicts the height of the projectile based upon initial | |
velocity and position, as see in the Figure](projectile.png) | |
2. Clone your 'homework_1' repository to your own computer. Now, we want to create a | |
function that uses kinematic formulas to predict the path of a projectile. The dimensions | |
are taken from official dart board dimensions | |
[darts](http://dartbrokers.com/dartboard-height.html). Create a function, | |
`projectile.m` that will calculate the location of an object with an initial velocity. The | |
function inputs are v_mag (initial speed), theta (initial angle). The output is the height | |
of the object 2.37 m from its starting position. Assume g=9.81 m/s^2 and its initial | |
height is 1.72 m. | |
```matlab | |
>> h=projectile(v_mag,theta) | |
h= 1 | |
``` | |
In addition to the output of `h`-height at 2.37 m-plot the path of the object from its | |
initial position to its position at 2.37 m away from the start. *Note: use your | |
`setdefaults.m` to set the plot defaults before outputting the result.* |