Simple Machines Experiment: Make a Pulley

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Simple Machines Experiment: Make a Pulley
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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 banister.
4. Pull down on the loose end of the string to pull the object up.

Was it easier or harder to lift the object on the string once it was wrapped over the banister or railing? How did the pulley help you do work?

Copy and paste the following link to your browser to download the Simple Machines app by Tinybop:
https://itunes.apple.com/us/app/simple-machines-by-tinybop/id936966570?mt=8
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1
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Simple Machines Experiment: Make a Pulley
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