Phys Sci - 1/8, 1/9 - Levers and Mechanical Advantage

II.  Mechanical Advantage.  Remember, Mechanical Advantage is __________________________.

There must be formulas for Mechanical Advantage.  Let's use a labeled picture of a lever to help figure out what those formulas are.

III.  Lab - Levers and Mechanical Advantage.

You will build three different levers and record the appropriate measurements to calculate the MAF and MAL for each. Set your E (effort) and R (resistance, or "rock") mass hangers so they are at the 1cm and 99cm marks, respectively (the edge of each hanger should be flush with the ends of the meter stick).  

•  Build a lever with a resistance mass of 400g and an effort mass of 200g.  Move the fulcrum to balance the lever. Take a picture.

• Build a lever with a resistance mass of 500g and an effort mass of 400g. Move the fulcrum to balance the lever. Take a picture.

• Build a lever with a resistance mass of 200g and and effort mass of 500g. Move the fulcrum to balance the lever. Take a picture

• USE GOOGLE DRAWING TO CREATE LABELED PICTURES FOR EACH LEVER.  Resistance length and mass.  Effort length and mass.  Identify the fulcrum.

You must now create a Sheet that allows you to input all of the data above and establish formulas that will complete the mechanical advantage calculations.  Your MAL and MAF columns should be side-by-side for easy comparison. Use the practice "snowman" data from our notes to test your data table to prove that it works.  Include units with column headings. 

Print your pictures and data table. Turn them in. One page only.

Lever 1 pic and labels (5 points)

Lever 2 pic and labels (5 points)

Lever 3 pic and labels (5 points)

Sheet with units, labels, and MA calculations (5 points)

20 points total.

COMPLETE YOUR SIX SIMPLE MACHINES SUMMARY AND TURN IT IN BY THE END OF THE DAY.