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Lesson Plan

Pulleys

Summary: 
Investigate with pulleys to find out how they change the direction of a force, and how multiple pulley systems can make work easier.
Science content (2016 curriculum): 
Physics: Motion and Forces, Newton’s Laws, Gravity (K, 2, 6)
Physics: Simple and complex Machines (5)
Procedure: 

A progression of activities that works well (with recommended substitutions):

Pulley free play, for students to understand how pulleys rotate to move rope through them, making the rope move more easily than without a pulley (way less friction). They will also show how a pulley can change the direction of a force. They will get creative with multiple pulleys and make their own systems.

Start adding more pulleys to show how they give a force advantage. Recommend measuring forces with counters, but could also just feel the forces needed to lift a water bottle.

End with a dramatic demonstration of how multiple pulley systems can be used to pull up heavy weights.

Grades taught: 
Gr 4
Gr 5
Teacher: 
Ingrid
Teaching Site: 
ingridscience afterschool
Lesson plan originally developed and delivered: 

ingridscience afterschool