JSFiddle - React, Tailwind, and code Playground

HTML

<canvas id="canvas" width="500" height="300"></canvas>

CSS

canvas {border:1px solid;}

JavaScript

var context=canvas.getContext('2d');

var v=70;
var a=65;
var k=0.1;
var p=Math.PI/180;
var vx=v*Math.cos(a*p);
var vy=v*Math.sin(a*p);
var x=0;
var y=0;

context.beginPath();
context.lineTo(x, 300-y);

while (y>=0) {
x+=vx*k;
y+=vy*k;
vy-=9.8*k;
context.lineTo(x, 300-y);
}

context.stroke();