Feb. 18
Objectives:
Each student should be able to:
• Recall equations for work, torque, AMA and efficiency
• identify parts of a lever system
• identify and draw types of levers
• solve for unknown value in lever system when given other three parts of forces and distances
• determine mechanical advantage of levers and pulleys
• name and draw three types of pulleys
• name alternate names for block and tackle
• determine number of supporting ropes in a pulley system
• draw pulley system according to required mechanical advantage or force or distance
• build pulley system given pulleys, resistance and string
• correctly use units with measurements
• correctly solve equations using steps of: 1) formula, 2) substitution, 3) show operation (especially division step of algebra), 4) produce answer, 5) use units correctly throughout problem and in final answer.
• determine IMA in pulley system and apply this number to determine effort and/or resistance force
• determine AMA in pulley using equation correctly
• determine efficiency in pulley system using equation, showing work and producing a final answer as a percentage
Bell Ringer:
Draw and label E, R and fulcrum for 3 types of levers. Identify the lever as type I, II or III and name a common tool which is an example of that type of lever.
Lesson:
1) Students should complete "Pulley Review" and practice building pulleys in class.
Assignment:
1) Students should complete "Pulley Review". Remember that test on Thursday morning (tomorrow) is on Work, Torque, LEver and Pulleys - so review ALL your notes and worksheets!
