fix gravity

Program.cs

@@ -21,7 +21,7 @@ namespace game
 			cursor.FillColor = Color.Green;
 
 			ball_t ball = new ball_t(50f);
-			ball_t ball2 = new ball_t(50f, new Vector2f(100, 100), new Vector2f(1f, .5f));
+			ball_t ball2 = new ball_t(25f, new Vector2f(100, 100), new Vector2f(.5f, .5f));
 
 			// main loop
 			while (window.IsOpen)

ball.cs

@@ -62,7 +62,7 @@ namespace game
 		}
 		public void Run(RenderWindow window)
 		{
-			RunPhysics(new Vector2f(0f, 0.000002f * this.shape.Radius));
+			RunPhysics(new Vector2f(0f, .0001f));
 			window.Draw(this.shape);
 		}
 	}