In the Simple Machines app by Tinybop, students use pulleys to send satellites into orbit and birds into flight. In this printable activity, you can build a simple pulley together.
YOU NEED:
+ A long string
+ A rock, book, or other heavy object
+ A railing or banister
MAKE A PULLEY:
1. Tie the string around your heavy object.
2. Try to lift the object straight up with the string. Is it easy or difficult to lift?
3. Loop the loose end of the string not tied to the object around the railing or b