The Case of the Barfy Birthday by Michele Torrey Read Free Book Online Page B

cup up, you can now relax on the couch and pull the string down, with the same effect.
    Using two or more pulleys divides the load. In this setup, if your rock-filled cup weighs 1 pound, pulley B reduces the weight (or force) you must pull by one-half. Now, instead of pulling 1 pound of rocks, you are pulling ½ pound. In return, you must pull twice the length of string. As a test, try the same setup without pulley B. Feel and see the difference?

“DO YOU SUPPOSE FRISCO, BALONEY, AND SHADY JIM ARE ALL IN IT TOGETHER?” asked Drake, quite horrified by the thought.
    June gasped. “But that would be cheating!”
    “Cheating indeed, Ms. Jewell,” agreed Nell. “But it’s all we’ve got to go on right now.”
    “Great Scott!” cried Drake. “Don’t look now. To your left. By the corn dogs. Under the licorice ropes. James Frisco! The very man!”
    Drake and Nell sprang into action. They whipped out their magnifying glasses. They whipped out their periscopes. Their binoculars. Their insect repellant (it was a rather buggy day). They began surveillance, determined to expose Frisco, the bad mad scientist, at his game.