Question

Directions Create a class that computes the lift and drag of a rectangular planform wing. Lift can be calculated with the following equation: lift = Cl * A * 0.5 * rho * V2 Cl is the lift coefficient; it is dimensionless A is the area of the wing in m2 rho is the air density, in kg/m3 , for the altitude the wing is flying V is the velocity in m/s Drag can be calculated with the following equation: Drag = Cd * A * 0.5 * rho * V2 Cd is the drag coefficient; it is dimensionless The other variables are the same as the lift equation. Notes: Cl and Cd vary with the wing angle of attack. rho varies with altitude. A rectangular planform wing is 85% efficient when compared to the optimal elliptical wing.

Answer 1

import java.io.*;
import java.util.*;

public class LiftDrag {
   
      public static void calculateLift(){
          Scanner sc = new Scanner(System.in);
          System.out.print("Enter lift coefficient:");
          double ci = Double.parseDouble(sc.nextLine());
         
          System.out.print("Enter area:");
          double ar = Double.parseDouble(sc.nextLine());

          System.out.print("Enter air density:");
          double rho = Double.parseDouble(sc.nextLine());

          System.out.print("Enter velocity:");
          double v = Double.parseDouble(sc.nextLine());

          double lift = ci * ar * 0.5 * rho * v * v;
          System.out.println("Lift:" + lift);
      }
      public static void calculateDrag(){
          Scanner sc = new Scanner(System.in);
          System.out.print("Enter lift coefficient:");
          double cd = Double.parseDouble(sc.nextLine());
         
          System.out.print("Enter area:");
          double ar = Double.parseDouble(sc.nextLine());

          System.out.print("Enter air density:");
          double rho = Double.parseDouble(sc.nextLine());

          System.out.print("Enter velocity:");
          double v = Double.parseDouble(sc.nextLine());

          double drag = cd * ar * 0.5 * rho * v * v;
          System.out.println("Drag:" + drag);
      }
      public static void main(String[] args){
          calculateLift();
          calculateDrag();
      }
}