Mathematical Library Methods

Chapter 7

Mathematical Library Methods

Class 10 - Logix Kips ICSE Computer Applications with BlueJ

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Java Program: Final Velocity Calculation

14. Write a program in Java to compute the final velocity of a vehicle using the following formula:

          v² = u² + 2as

where, u = initial velocity, a = acceleration and s = distance covered; they are entered by the user.

Given Formula

Where:

• u = initial velocity
• a = acceleration
• s = distance covered

import java.util.Scanner;
 
public class FinalVelocity {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
 
        // Input values
        System.out.print("Enter initial velocity (u): ");
        double u = sc.nextDouble();
 
        System.out.print("Enter acceleration (a): ");
        double a = sc.nextDouble();
 
        System.out.print("Enter distance covered (s): ");
        double s = sc.nextDouble();
 
        // Calculate final velocity
        double v = Math.sqrt((u * u) + (2 * a * s));
 
        // Output
        System.out.println("Final velocity (v) = " + v);
 
        sc.close();
    }
}

Sample Input 
Enter initial velocity (u): 10
Enter acceleration (a): 2
Enter distance covered (s): 50

Sample Output 
Final velocity (v) = 17.320508075688775

Explanation

1. The program takes u, a, and s from the user using the Scanner class.
2. It calculates u²+2as using arithmetic operators.
3. Math.sqrt() is used to find the square root to obtain the final velocity.
4. The result is displayed.