commit 758a147dad59076d21f62a52c47511cc63ff969c
Author: lemon <tocjo@riseup.net>
Date:   Thu Mar 24 12:37:43 2022 -0300

    initial commit

diff --git a/gravity.c b/gravity.c
new file mode 100644
index 0000000..b9cc78a
--- /dev/null
+++ b/gravity.c
@@ -0,0 +1,32 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+int main(int argc, char *argv[]) {
+
+  /* intro */
+  printf("\nWarning: In order for this calculator to work properly, you must use kg for mass, m/s2 for gravity, and mts for height.\n\n");
+  printf("(The order is: m, g, h)\n\n");
+  
+  /* variables */
+  double mass, grav, height, result;
+
+  if (argc != 4) {
+    printf("Invalid arguments.\n");
+    return -1;
+  }
+
+  /* converting arguments into float */
+  mass = atof(argv[1]);
+  grav = atof(argv[2]);
+  height = atof(argv[3]);
+
+  /* final calculation (m * g * v = x quantity of joules) */
+  result = mass * grav * height; 
+
+  /* print of results */
+  printf("The result is: %6.2fJ\n", result);
+
+  return 0;
+
+} 
diff --git a/kinetic_energy.c b/kinetic_energy.c
new file mode 100644
index 0000000..d73c59e
--- /dev/null
+++ b/kinetic_energy.c
@@ -0,0 +1,34 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+int main(int argc, char *argv[]) {
+
+  /* intro */
+  printf("\nWarning: In order for this calculator to work properly, you must use kg for mass and m/s2 for velocity.\n\n");
+  printf("(The order is: m, v)\n\n");
+
+  /* variables */
+  double mass, vel, result;
+
+  if (argc != 3) {
+    printf("Invalid arguments.\n");
+    return -1;
+  }
+
+  /* converting arguments to float */
+  mass = atof(argv[1]);
+  vel = atof(argv[2]);
+
+  /* km to m/s */
+  vel = vel * 1000 / 3600;
+
+  /* final calculation (½ m * v² = x quantity of joules) */
+  result = (0.5 * mass * pow(vel, 2));
+
+  /* print of results */
+  printf("The result is: %6.2fJ", result);
+
+  return 0;
+  
+}