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Understanding Mechanical Advantage and Rhenium: Key Concepts in Physics

This lesson delves into the concept of mechanical advantage (MA), which quantifies how much a machine amplifies force. Utilizing the formula MA = output force/input force or MA = input distance/output distance, students will learn to calculate mechanical advantage effectively. Additionally, we'll discuss Rhenium (Re), the last stable element discovered in 1925, known for its rarity and high cost. Primarily used in fighter jet turbine blades, Rhenium's significance extends beyond the periodic table. Tonight's homework includes completing the Lab Agenda.

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Understanding Mechanical Advantage and Rhenium: Key Concepts in Physics

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Presentation Transcript

  1. Warm up 5/07/13 • Question: What is mechanical advantage? • Answer: • How much a machine multiplies force • MA =output force / input force • = input distance / output distance • Goal: I will calculate mechanical advantage.

  2. Element of the day • 75 – Rhenium – Re • Rhenium was the last stable element to be discovered, in 1925 in Germany. It is very rare and costs hundreds of dollars per ounce. • About ¾ of the world’s rhenium is used in fighter jet turbine blades.

  3. Quiz / Vocab Reminder • Pulley Lab • Tonight’s HW • Finish Lab Agenda / HW

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