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# Carolina™ Simple Machines: Pulleys Kit

Item # 751340 Exclusive

Grades 6–12. Investigate the ability of pulleys (simple machines) to create a mechanical advantage. Students build 3 different pulley systems using fixed and movable pulleys. For each system, they measure the force needed to lift a load, calculate the mechanical advantage, and calculate the percentage of efficiency. Materials support 10 groups of 3 students.

Price

\$97.78

In stock and available to ship.

Grades 6–12. Students build the following pulley systems:

• 1 fixed
• 2 fixed, 1 movable
• 3 fixed, 2 movable

To further challenge students, teachers are provided instructions to build a more complex pulley system using 4 different lengths of rope, 4 movable pulleys, and 1 fixed pulley. In this system, only 2 rope segments support the load. Counting ropes to determine the mechanical advantage does not work. Challenge students to explain why and calculate the mechanical advantage.

Extend this lesson by:

• Combining student groups to create a new pulley system and determine its mechanical advantage
• Investigating how pulleys can be used to multiply distance
• Presenting information on how pulleys are used in various careers
• Creating a picture collage of pulleys in action to incorporate an artistic element (STEAM)

Students build 3 different pulley systems using fixed and movable pulleys. For each system, they measure the force needed to lift a load, calculate the mechanical advantage, and calculate the percentage of efficiency. Materials support 10 groups of 3 students. A ring stand, ring, hanging mass set, spring scale, and meter stick for each group are needed but not supplied. Includes teacher’s manual with reproducible student guide.

• This item is only available from Carolina Biological Supply Company.

Components Qty Included?
Single-Sheave Pulleys 10 Included
Double-Sheave Pulleys 10 Included
Triple-Sheave Pulleys 10 Included
Pulley Cord, Roll 1 Included
Paper Clips 100 Included
Digital Resource Instruction Card 1 Included
Teacher's Manual with Reproducible Student Guide 1 Included
Rings 10 Needed, Not Included
Ring Stands 10 Needed, Not Included
Hanging Masses (50 to 200 g) 10 Needed, Not Included
Spring Scales or Force Sensors (measuring in newtons) 10 Needed, Not Included
Meter Sticks 10 Needed, Not Included
Scissors 10 Needed, Not Included