Throwing+a+ball.ipynb

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     "text": [
      "908,461,993.939 m s-2\n"
     ]
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   "source": [
    "speed = 299792458 / 3. # m s-1\n",
    "delta_t = 0.11 # s (Source: http://www.science20.com/science_20/science_baseball_what_fastest_pitcher_can_throw-51797)\n",
    "acceleration = speed / delta_t\n",
    "print \"{:,} m s-2\".format(acceleration)\n"
   ]
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      "0.145 kg\n"
     ]
    }
   ],
   "source": [
    "ball_mass = 145 # grams\n",
    "ball_mass = ball_mass / 1000. # kilograms\n",
    "print \"{} kg\".format(ball_mass)"
   ]
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   "source": [
    "net_force = ball_mass * acceleration"
   ]
  },
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     "text": [
      "131,726,989.121 N\n"
     ]
    }
   ],
   "source": [
    "print \"{:,} N\".format(net_force)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {
    "collapsed": false
   },
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     "text": [
      "6,109,786.13735 lbs\n"
     ]
    }
   ],
   "source": [
    "equivalent_mass = (net_force / 9.8) # kg\n",
    "equivalent_mass = equivalent_mass / 2.2 # lb\n",
    "print \"{:,} lbs\".format(equivalent_mass)"
   ]
  },
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    "_According to the Guinness Book of World Records, the heaviest thing to ever be weighed as of 2015 was the Revolving Service Structure of launch pad 39B at the Kennedy Space Center in Florida. It weighed 2423 tonnes, or 5,342,000 pounds_\n",
    "\n",
    "![example](http://asd.gsfc.nasa.gov/archive/sm4/art/multimedia/missionprep/2009-2453.jpg)"
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