[
  // Free fall distance (vertical)
  {
    name: "Free Fall Distance",
    input: [
      {name: "t", magnitude: "s"},  // Time in seconds
      {name: "g", magnitude: "m/s²"}  // Gravitational acceleration
    ],
    output: {name: "h", magnitude: "m"},  // Height in meters
    d4rtCode: "0.5 * g * pow(t, 2)"
  },
  
  // Newton's Law of Universal Gravitation
  {
    name: "Gravitational Force",
    input: [
      {name: "m1", magnitude: "kg"},  // Mass 1
      {name: "m2", magnitude: "kg"},  // Mass 2
      {name: "r", magnitude: "m"}     // Distance between masses
    ],
    output: {name: "F", magnitude: "N"},  // Force in newtons
    d4rtCode: "(6.67430e-11 * m1 * m2) / pow(r, 2)"
  },
  
  // Kinetic Energy
  {
    name: "Kinetic Energy",
    input: [
      {name: "m", magnitude: "kg"},  // Mass
      {name: "v", magnitude: "m/s"}  // Velocity
    ],
    output: {name: "KE", magnitude: "J"},  // Energy in joules
    d4rtCode: "0.5 * m * pow(v, 2)"
  },
  
  // Projectile Motion Range
  {
    name: "Projectile Range",
    input: [
      {name: "v", magnitude: "m/s"},  // Initial velocity
      {name: "θ", magnitude: "deg"}   // Launch angle
    ],
    output: {name: "R", magnitude: "m"},  // Horizontal distance
    d4rtCode: "(pow(v, 2) * sin(2 * radians(θ))) / 9.80665"
  }
]