Harpo's World

comic book page about a contraption to make electricity with dog power.
Page 1

TEEGAN: Wow, what's this crazy contraption?

PERSIA AND AKANE: It's our latest invention!

TEEGAN: What's it supposed to do?

AKANE: Watch. You turn on the radio which wakes the squirrel.

PERSIA: The squirrel grabs the nut which pulls the rope which opens the trapdoor.

TEEGAN: I still don't get it.

AKANE: Wait, there's more. The weight lands on the teetertotter, and the ball bounces and tips the ramp. The roller skate rolls and kicks the bowling ball into the basket.

Vocabulary

  • contraption: A mechanical device; a gadget.

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A mechanical device; a gadget.

Activity

  1. Which simple machine is used most often in this invention?
    [anno: A pulley is used most often in this invention]
  2. Describe how a lever is used in this invention.
    [anno: A lever is used to toss a baseball up against a board that moves a roller skate.]
  3. If the lever were removed from this machine, what other parts of the machine would need to change to make the invention work?
    [anno: Answers may vary but could include that the pulley attached to the nut could be attached to the nut on one end and the slice of pizza on the other end. This would mean removing the roller skate and the bowling ball that drops into the basket.]