#include <iostream>
#include <cmath>
using namespace std;
int main() {
const double g = 9.8; // percepatan gravitasi m/s^2
double v; // kecepatan awal
cout << "Masukkan kecepatan awal (m/s): ";
cin >> v;
// sudut optimal untuk jarak terjauh adalah 45 derajat
double theta = 45.0;
double theta_rad = theta * M_PI / 180.0;
// waktu total terbang
double t = (2 * v * sin(theta_rad)) / g;
cout << "Waktu untuk mencapai jarak horizontal terjauh adalah: " << t << " detik." << endl;
return 0;
}
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