Materials: MATERIALS: 2 THREAD SPOOLS, 40 FEET OF STRING. 2 ROUND PENCILS, PAPERCLIPS OR BINDER CLIPS SMALL BAG OF CHIPS
A pulley changes the direction of a force needed to do work. Can you use a pulley to zipline a snack to a hungry friend across the River?
DID THE CHIPS MOVE ACROSS THE ROOM? WHAT DID YOU THINK WOULD HAPPEN? WHAT COULD YOU CHANGE? WHAT DID YOU LEARN?
Teacher notes: Students create a pulley from spool and pencil and string.
1. Tie the ends of the string together to make a large loop. Put the pencils through the spool centers. Hold one pencil so the spool moves freely. Have a friend stand on the other side of the room with second spool. Wrap the string around the spools. 2. Attach the snack to the string with a paper clip or binder clip. Pull the string to move the chips.