3. The electric remote control causes the train car to accelerate down the ramp.

1. 1. A train car pushes a hammer by the use of an electric remote control. The train car does work on the hammer. 2. A hammer falls onto a pile of books stacked on top of a remote control. The force of the hammer causes the remote control to turn on. 3. The electric remote control causes the train car to accelerate down the ramp. 4. The momentum gained in the moving train car causes enough force to push the track over and release the ball. 5. The ball had potential energy until it was released swinging to hit the ball on the stool with its kinetic energy. 6. The ball then rolled off the stool and accelerated down the stairs until it hit the standing books. 7. The books fell over in the domino effect because of Newtons First law. 8. The books hit another ball causing it to accelerate down the stairs. 9. The ball then landed on a book placed on top of the hairdryer switch causing it to turn on. 11. The books knocked over the final ball which landed on the button to turn it on and play the sounds. 10. The electric hairdryer blew the books over.