Question

in java

Program 0: Due 9/3 A track coach wants to predict where her runners are on a 600 foot course. One complication is that the course is an out-and-back course, so runners must stop and turn at the half way point. Write a program that allows her to specify each runner's name, top speed (m/h) and acceleration (f/s/s). Print the predicted location (distance from the start) of each runner every 5 seconds. There is a maximum of 5 runners. Your output should be similar to the following table: Acceleration (f/s/s) Runner Max Speed (f/s) 30.0 Nelly Steve 8.0 8.8 3.0 Time Nelly 0.0 Steve 0.0 0.0 243.8 10.0 75.1 0.0 0.0 XX.x To correctly model the distance of each runner, you must correctly model the acceleration of cach runner. Recall that distancc = velocity*time, and vclocity=max(acccleration*time, max_speed). At the start of the race, each runner initially has zero velocity and can only speed up to top speed at the acceleration specified. At the turn around, each runner must decelerate at the acceleration specified, and then accelerate in the return direction Include Nelly, Steve, and Usain (max spccd = 41.0 f/s, acceleration = 11.0 f/s/s) in the output you generate Create a classs Runner. Create an instance of this class for each runner the coach enters Your main in the Runner class should produce the output for the three runners given above. (That is, I should be able to compile and run your Runner.java code, and without further input, the table for three runners will be generated.) Onc way to approach this problem is to iterate over some suitably small time interval (say 0.01 seconds), computing the velocity and distance for the interval, and reporting the distance each 10 seconds. You must remember to decelerate your runners as they approach the turn around

Answer 1

class Runner
{
   double max_speed;
   double acceleration;
   double velocity;
   double distance;
   public Runner(double max_speed, double acceleration)
   {
       this.max_speed = max_speed;
       this.acceleration = acceleration;
   }
   double ComputeDistance(double time)
   {
       double velocity_temp;
       if(this.acceleration * time > this.max_speed)
       {
           velocity = this.acceleration * time;
       }
       else
       {
           velocity = this.max_speed;
       }
       this.distance = velocity * time;
      
       return this.distance;
   }
   public static void main(String args[])
   {
       Runner Nelly = new Runner(30.0, 8.0);
       Runner Steve = new Runner(8.8, 3.0);
       double max_acceleration1 = Nelly.acceleration;
       double max_acceleration2 = Steve.acceleration;
       System.out.println("Runner \t max Speed(f/s) \t Acceleration(f/s/s)");
       System.out.println("Nelle \t "+Nelly.max_speed+" \t \t \t"+Nelly.acceleration);
       System.out.println("Steve \t "+Steve.max_speed+" \t \t \t"+Steve.acceleration);
       System.out.println("Time \t Nelly \t Steve");
       int flag1 = 0,flag2 = 0;
       for(int i = 0; i < 30;i++)
       {
           if(i%5 == 0)
           {
                   if(Nelly.distance >= 600 && flag1 == 0)
                   {
                       Nelly.acceleration = 0;
                       flag1 = 1;
                   }
                   else
                   {
                       Nelly.acceleration = max_acceleration1;
                   }
                   if(Steve.distance >= 600 && flag2 == 0)
                   {
                       Steve.acceleration = 0;
                       flag2 = 1;
                   }
                   else
                   {
                       Steve.acceleration = max_acceleration2;
                   }
               System.out.println(i+"\t"+Nelly.ComputeDistance(i)+"\t"+Steve.ComputeDistance(i));
           }
       }
      
   }
}

deepika@deepika-TravelMate-P243-M:~/Desktop X File Edit View Search Terminal Help deepika@deepika-TravelMate-P243-M :-/Desktop$ java Runner Runner max Speed(f/s) Acceleration(f/s/s) Nelle 30.0 8.0 Steve 3.0 Time Nelly Steve 0.0 0.0 200.0 75.0 10 800.0 300.0 450.0 675.0 20 3200.0 176.0 5000.0 1875.0 deepika@deepika-TravelMate-P243-M:~/Desktops 15 25 O Wed 10:09

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