Nature of Code 2.5

Mover.js

class Mover {
  constructor({ mass = 1, size = 40 } = {}) {
    this.mass = mass;
    this.location = new Vector();
    this.velocity = new Vector();
    this.acceleration = new Vector();
    this.size = size;
  }

  applyForce = v => {
    let f = Vector.div(v, this.mass);
    this.acceleration.add(f);
  };

  update = () => {
    this.location.add(this.velocity);
    this.velocity.add(this.acceleration);
    this.acceleration.mult(0);
  };
}