centripetalForce.js

function centripetalForce(satellite, centre) {
  //Get the direction of the force
  let force = p5.Vector.sub(centre, satellite.position).normalize();
  //Get the distance to centre of rotation from our satellite 
  let radius = p5.Vector.sub(centre, satellite.position).mag();
  //The velocity squared
  let velocitySquared = p5.Vector.dot(satellite.velocity, satellite.velocity);
  //Pull it all together with the f = (m * v^2) / r equation
  force.mult(velocitySquared);
  force.mult(satellite.mass);
  force.mult(1/radius);
  return force;
}