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@@ -54,4 +54,28 @@ saveas(h,'figure_02.png')
 ```
 ![Cumulative US Energy Use per Year from 1949-2016](./Problem 4/figure_02.png)
 
+#Problem freefall
+
+```MATLAB
+g=figure();
+hold on
+timespan=30;
+
+for h=[.1,1,5]
+    freefall(h,timespan)
+end
+set(0, 'defaultAxesFontSize', 16)
+set(0,'defaultTextFontSize',14)
+set(0,'defaultLineLineWidth',3)
+set(gcf, 'Position', [200, 200, 1000, 800])
+xlabel('Time (seconds)')
+ylabel('Velocity (meters/second)')
+legend('v analytical(0.1)','v numerical(0.1)','v analytical(1)','v numerical(1)','v analytical(5)','v numerical(5)','Location','southeast')
+title('Velocity Comparison by Varying Time Steps')
+
+saveas(g,'figure01.png')
+```
+
+![Velocity Comparison by Varying Time Steps](./Problem 3/figure01.png)
+
 #Problem 5 (Velocity and Acceleration)