Electromagnetic induction

var loc, vel, acc, force, m, b, flux0, flux, e, i, r;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  loc = createVector(windowWidth/2, 0);

  vel = createVector(0, 5);

  acc = createVector(0, 0);

  force = createVector(0, 0);

  m = 2;

  noStroke();

  rectMode(CENTER);

}

​

function draw() {

  background(200);

  fill(150);

  rect(windowWidth/2, windowHeight/2, 200, 400);

  fill(50);

  rect(loc.x, loc.y, 20, 40);

  calculate();

}

​

function calculate() {

  loc.add(vel);

  vel.add(acc);

  acc.set(force.x, force.y);

  acc.div(m);

  e = (flux0 - flux) / millis() / 1000;

}