Calculating the free fall of an object in C.

physic.h

/***************************************************************
 * File: physic.h
 * Date: 2024-05-31 | 2024-06-01
***************************************************************/

#ifndef PHYSIC_H
#define PHYSIC_H

#include <math.h> // Library to `sqrt`

#define EARTH_GRAVITY 9.81

/**
 * @brief Calculate the time to reach ground.
 * @param HEIGHT_DISTANCE The distance to reach ground in meters.
 * @param GRAVITY_FORCE The pull force.
*/
long double TimeToReachGround(const long double HEIGHT_DISTANCE, const long double GRAVITY_FORCE)
{
    return sqrt(2 * HEIGHT_DISTANCE / GRAVITY_FORCE); // 
}

#endif

time_to_reach_ground.c

/***************************************************************
 * File: time_to_reach_ground.c
 * Date: 2024-05-31
***************************************************************/

#include <stdio.h>
#include "physic.h"

int main(int argc, char const *argv[])
{
    printf("%Lf\n", TimeToReachGround(100, EARTH_GRAVITY));
    return 0;
}