title: how to calculate physics in python?
body: <p>I am trying to calculate some physics in python. For example if I throw a ball that has a mass of 482kg and weighs 5 ounces 10 feet in the air, my program will tell me how long until it hits the ground, the speed at which it will fall, and the force of the impact. I have tried to implement the formulas for the force of impact:</p>
  
  <pre><code>import math
  height = int(raw_input('Height: '))
  weight = int(raw_input('Weight: '))
  v = math.sqrt(2)*height*weight
  mass = int(raw_input('mass: '))
  K.E = 1/2(mass*v**2)
  print K.E
  </code></pre>
  
  <p>but I get an error:</p>
  
  <pre><code>Traceback (most recent call last):
    File "C:/Python27/test.py", line 6, in &lt;module&gt;
      K.E = 1/2(mass*v**2)
  TypeError: 'int' object is not callable
  </code></pre>
  
  <p>Also, I do not know how to calculate how long it will fall and the speed at which it will fall.</p>