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copied!<p>I think your formula is wrong. h0 should be the initial velocity (which in your case is 0 m/s) and it should be multiplied with time.</p> <p>This is the correct one <a href="http://www.physicsclassroom.com/Class/1DKin/U1L6c.cfm" rel="nofollow noreferrer">from</a> <img src="https://i.stack.imgur.com/kyeDE.gif" alt="This is the for"></p> <p>So having said that, Vi*t is always 0 since your initial velocity is 0. What's left is 0.5 * 9.8 * timeElapsed * timeElapsed.</p> <pre><code> config.objectPos.Y = 0 //initial velocity + 0.5f * config.acceleration * timeElapsed * timeElapsed; </code></pre> <p>Also objectPost.Y should always start from 0 meters since it's starting from the top and it's going to fall.</p> <p>You can refer to this Console app code. Run it and see the time elapsed compared and compare it to the <a href="http://www.physicsclassroom.com/Class/1DKin/U1L6c.cfm" rel="nofollow noreferrer">results in</a> </p> <p>It should be 1.32 seconds.</p> <pre><code>using System; using System.Collections.Generic; using System.Diagnostics; using System.Linq; using System.Text; using System.Threading; using System.Threading.Tasks; namespace Physics_16783733 { class Program { static void Main(string[] args) { MyClass c = new MyClass(); } } public class MyClass { public Settings config = new Settings(); public Stopwatch timer = new Stopwatch(); public float timeElapsed; //in Seconds public Thread thread; static ManualResetEvent control; public MyClass() { control = new ManualResetEvent(false); //New thread (Drawing) thread = new Thread(new ThreadStart(Drawing)); thread.IsBackground = true; thread.Start(); control.WaitOne(); } public void Drawing() { try { while (true) { if (config.objectPos.Y < config.sizeBitmap.Height) { timer.Start(); } else { timer.Stop(); control.Set(); } //Bitmap screen = new Bitmap(this.pboxScreen.Width, this.pboxScreen.Height); SendScreen(); } } catch (ThreadAbortException tae) { Console.WriteLine(tae.Message); } } private void SendScreen() { timeElapsed = timer.ElapsedMilliseconds / 1000f; //Converting Milliseconds to Seconds if (config.objectPos.Y < config.sizeBitmap.Height) //Check if object isn't in the ground { //formula used is in http://www.physicsclassroom.com/Class/1DKin/U1L6c.cfm config.objectPos.Y = 0 //initial velocity + 0.5f * config.acceleration * timeElapsed * timeElapsed; } //Update txtbox (textbox) Console.WriteLine("Object position Y: " + config.objectPos.Y.ToString()); Console.WriteLine("Time elapsed : " + timeElapsed.ToString()); //using the data from http://www.physicsclassroom.com/Class/1DKin/U1L6c.cfm, time elapsed should be 1.32 seconds } } public class Settings { //I used data from http://www.physicsclassroom.com/Class/1DKin/U1L6c.cfm //where the given is: //vi = 0.0 m/s //d = -8.52 m //a = - 9.8 m/s2 public Size sizeBitmap; //height of the place where the object will start free falling public PointF objectPos; //Initial Position public float acceleration; public Settings() { sizeBitmap.Height = 8.52; objectPos.Y = 0; acceleration = 9.8f; } } public struct PointF { public float Y { get; set; } } public struct Size { public double Height { get; set; } } } </code></pre>

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