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Montano1993 [528]
3 years ago
7

A mechanic uses a screw driver to install a ¼-20 UNC bolt into a mechanical brace. What is the mechanical advantage of the syste

m? What is the resistance force if the effort force is 5 lb.
Computers and Technology
1 answer:
velikii [3]3 years ago
7 0

Answer:

15.7 ; 78.5

Explanation:

Mechanical advantage of a screw = Circumference / pitch

Circumference = pi × d

Where :

pi = 3.142, D = diameter

Therefore ;

Circumference = 3.142 × (1/4) = 0.785 in

Pitch = 1/TPI

TPI (thread per inch) = 20

Pitch = 1/ 20 = 0.05

Mechanical advantage = 0.785 / 0.05 = 15.7

Resistance force if effort force is 5lb

Mechanical advantage = Fr / Fe

Fe = effort force, Fr = resistance force

15.7 = Fr / 5

Fr = 15.7 × 5 = 78.5 lbs

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Answer:

import java.util.Scanner;

public class Solution {

   public static void main(String args[]) {

     Scanner scan = new Scanner(System.in);

     System.out.println("Enter your minute:");

     int minute = scan.nextInt();

     

     switch(minute){

         case 0:

         case 1:

             System.out.println("undercooked");

             break;

         case 2:

         case 3:

         case 4:

             System.out.println("soft-boiled");

             break;

         case 5:

         case 6:

         case 7:

             System.out.println("medium-boiled");

             break;

         case 8:

         case 9:

         case 10:

         case 11:

             System.out.println("hard-boiled");

             break;

         case 12:

             System.out.println("overcooked");

             break;

         default:

             if(minute > 12){

               System.out.println("overcooked");

             } else if (minute < 0){

                 System.out.println("Enter a valid minute.");

             }            

     }

   }

}

Explanation:

The first line is the import statement, which import the Scanner class for receiving user input. The next line is the class declaration which is named Solution.

The Scanner object is declared and assigned as scan. Then a prompt is displayed to the user asking the user to enter the minute. The user input is stored as minute.

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3 years ago
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