Page 107 - CA_Blue( J )_Class10
P. 107
5 {
6 Scanner sc= new Scanner (System.in);
7 double u,t,a,s;
8 System.out.print("Enter initial velocity in meter/second: ");
9 u=sc.nextDouble();
10 System.out.print("Enter the acceleration of the body in meter/second
+sq.: ");
11 a=sc.nextDouble();
12 System.out.print("Enter the time travelled in seconds: ");
13 t=sc.nextDouble();
14 s=(u*t) +1.0/2.0*a*Math.pow(t,2);
15 System.out.println("The distance travelled: "+s+" meters ");
16 }
17 }
You will get the following output:
To input three real numbers as arguments of main( ) method and calculate the roots of the quadratic
Program 3
equation using the following formula:
2
-b ± b - 4ac
x =
2a
2
Where, b - 4ac is known as the determinant of a quadratic equation.
1 class quadratic_equation
2 {
3 public static void main (double a, double b, double c)
4 {
5 double d,r1,r2;
6 d = Math.pow(b,2) - (4*a*c);
7 if(d>0)
8 {
9 r1 = (-b + Math.sqrt(d)) / (2.0 * a);
10 r2 = (-b - Math.sqrt(d)) / (2.0 * a);
11 System.out.println("The roots are " + r1 + " and " + r2);
12 }
105
Mathematical Library Methods 105

