Integrated Natural Science. Integrated Natural Science for Detroit Public Schools. Levers. Kat Woodring. 4.2.1 Analyze and label the parts of a lever and evaluate how a lever multiplies force. 4.2.2 Provide examples of first, second and third class levers.
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4.2.2 Provide examples of first, second and third class levers.
4.2.3 Compare parts of the human body to the types of levers.
4.2.4 Calculate and determine the mechanical advantage of a lever.Key Questions:
Can you think of other muscle levers in your body?
Use at least 3 strings!
Do 4 trials and record how many weights to hang and where you hang them.Lever Challenge
Try it...Basic Lever Investigation
Add two masses at 20 cm.
HINT: you will need two stringsBasic Lever Investigation
Put your rule in terms of input and output and forces and distances.
What if there is more than one location on either side of the lever?Mathematical Rule for Balancing the Lever
Output Force / Input ForceMechanical Advantage
Output force (N)
MA = Fo
Input force (N)