Update README.md

Author: mustafakaptanlar

README.md

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-# Modest Physics Calculator
-A physics calculator which includes currently;
-
-  *Average Speed
-  
-  *Acceleration Formula
-    
-  *Density Formula
-  
-  *Newton's Second Law (Force) Formula
-    
-  *Power Formula
-    
-  *Weight Formula
-  
-  *Pressure Formula
-  
-  *Kinetic Energy Formula
-  
-  *Ohm's Law Formula
-  
-  *Frequency Formula
+Modest Physics Calculator
 
+A physics calculator that includes calculations for Average Speed, Acceleration, Density, Newton's Second Law (Force), Power, Weight, Pressure, Kinetic Energy, Ohm's Law and Frequency.
+
+How to use
+
+    * Open the calculator by running the main.py file.
+
+    * Input the formula you want to calculate (e.g. "average speed", "acceleration", "density", "frequency" etc.)
+
+    * Input the required data for the calculation.
+
+    * Press "Enter" to see the result.
+
+    * To exit the program, enter "exit"
+
+Formulas and concepts
+
+    * Average Speed : Speed = Distance/Time
+    * Acceleration : Acceleration = (Final Velocity - Initial Velocity) / Time
+    * Density : Density = Mass / Volume
+    * Newton's Second Law (Force) : Force = Mass * Acceleration
+    * Power : Power = Work / Time
+    * Weight : Weight = Mass * Gravity
+    * Pressure : Pressure = Force / Area
+    * Kinetic Energy : Kinetic Energy = 1/2 * Mass * Velocity^2
+    * Ohm's Law : Voltage = Current * Resistance
+    * Frequency : Frequency = Velocity / Wavelength
+
+How to contribute
+
+We welcome contributions to this project. If you find a bug or have a feature request, please submit an issue. If you would like to contribute code, please submit a pull request.
+
+Future development
+
+    * Adding more formulas and calculations.
+    * Adding new features such as graphs, and more.