// Name: Dylan McDonald
// Class and Section: CS 54, Section <n>
// Date: 4 September, 2007
// Purpose: Calculate physics equations for Stimson's AP Physics Students

#include <iostream>
using namespace std;

int main()
{
  const double GRAVITY = 9.80665;
  double airTime, initDisplacement, initVelocity, finalDisplacement,
         finalVelocity;

  // ask for user input
  cout << "Time in Air (s): ";
  cin >> airTime;
  cout << "Starting Velocity (m / s): ";
  cin >> initVelocity;
  cout << "Starting Displacement (m): ";
  cin >> initDisplacement;

  // find the displacement using the Part I equation
  finalDisplacement = (GRAVITY / 2.0 * airTime * airTime)
                    + (initVelocity * airTime) + initDisplacement;
  cout << "The watermelon fell " << finalDisplacement << " m." << endl;

  // find the velocity using the Part II equation
  finalVelocity = (GRAVITY * airTime) + initVelocity;
  cout << "The watermelon hit the ground at " << finalVelocity
       << " m / s." << endl;
  

  return 0;
}