Name: ______
Pulley Lab
Purpose: To discover whether pulleys change size, direction or distance of forces. To investigate what happens to mechanical advantage if more pulleys are added.
Hypothesis: Write an If…then…because statement about what will happen to Mechanical Advantage if more pulleys are used to lift a mass.
If ______,
then ______,
because ______.
Materials: Pulleys; Masses; Spring scales
Procedure:
- Build the single fixed pulley according to the diagram given.
- Test the input force needed to lift the output by checking the spring scale as the load is lifted off 10 cm off the lab table.
- Repeat the process for all other pulleys on the data table.
- Take notice of how much string you must pull to get the output 10 cm off of the table
Draw a neat picture of an everyday object that shows how pulleys change the direction of the force put into them. Make sure to label the input and output forces in your picture.
Name: ______
Pulley Lab
Purpose: To discover whether pulleys change size, direction or distance of forces. To investigate what happens to mechanical advantage if more pulleys are added.
Hypothesis: Write an If…then…because statement about what will happen to Mechanical Advantage if more pulleys are used to lift a mass.
If ______,
then ______,
because ______.
Materials: Pulleys; Masses; Spring scales
Procedure:
- Build the single fixed pulley according to the diagram given.
- Test the input force needed to lift the output by checking the spring scale as the load is lifted off 10 cm off the lab table.
- Repeat the process for all other pulleys on the data table.
- Take notice of how much string you must pull to get the output 10 cm off of the table
Draw a neat picture of an everyday object that shows how pulleys change the direction of the force put into them. Make sure to label the input and output forces in your picture.
Data:
Pulley / Input Force(N) / Output Force
(N) / MA
Single Fixed
Single Moveable
Single Fixed
Single Moveable
Double Fixed
Single Moveable
Your Choice
What pulley system gave the greatest Mechanical Advantage? Use numbers from your data. What is the trend between number of pulleys and Mechanical Advantage?
______
______
______
______
______
______
When you have more ______, you have to apply
______, but you must pull the string a
______
Data:
Pulley / Input Force(N) / Output Force
(N) / MA
Single Fixed
Single Moveable
Single Fixed
Single Moveable
Double Fixed
Single Moveable
Your Choice
What pulley system gave the greatest Mechanical Advantage? Use numbers from your data. What is the trend between number of pulleys and Mechanical Advantage?
______
______
______
______
______
______
When you have more ______, you have to apply
______, but you must pull the string a
______