#include
int main(void) {
double seconds = 0;
printf("Enter seconds : ");
scanf("%lg", &seconds);
printf("falling time : %g seconds\n", seconds);
printf("traveld distance : %g meters\n", .5 * 9.81 * seconds * seconds);
printf("object velocity : %g m/s\n", 9.81 * seconds);
return 0;
}