text: 'use strict';
  
  Object.defineProperty(exports, "__esModule", {
    value: true
  });
  exports.gravityForce = gravityForce;
  /**
   * TODO Implement gravity force using "constantForce"
   * f = mg
   * g = 9.8 m/sec2
   */
  function gravityForce() {
    throw new Error('No gravity');
  }