JSFiddle - React, Tailwind, and code Playground

by k6e2n0t12

JavaScript

var bisection = function(v0,theta,length,ys,ye){//predict bisection
	return (v0*Math.cos(theta)*(1*v0*Math.sin(theta)+Math.sqrt( v0*Math.sin(theta)*v0*Math.sin(theta) - 2*9.8*(ye-ys) ))-length*9.8);
}
var a = 0;
var b = 100;
var e = 0.0001;
var ys = 1.1;
var ye = 0;
var length = 35.78;
var theta = 82.5/180*Math.PI;
while(1){
  var m = (a+b)/2;
  console.log(m,theta,length,ys,ye);
  var fm = bisection(m,theta,length,ys,ye);
  var fa = bisection(a,theta,length,ys,ye);
  if(fm*fa<0)
    b = m;
  else
    a = m;
  if((b-a)/2<e){
    v0 = a;
    break;
  }
}
console.log(v0);