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  U1: Small inclined plane
      Pendulum bobs
      Springs
      Hooke's Law Apparatus






  U2: Carts
      Pasco track carts
      Car
      Ball launching cart
      Fan cart
      Double ball launchers






   U3: Liquid accelerometer
      Bocce balls
      Pingpong balls
      Foam balls
      Marbles



  U4: Nerf balls
      Blow up balls
      Hollow balls

  U5: Thick rope
      Large pulleys
      Balls