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Understanding Mechanical Advantage and the Unique Properties of Osmium

This document covers the concept of Mechanical Advantage (MA) with a specific example: lifting a 10N object using 5N of force, yielding a MA of 2. It also introduces Osmium, the hardest and densest element on the periodic table, known for its high cost and unique alloys with iridium. Notably, it discusses osmium's dangerous reaction with air producing osmium tetroxide. The document includes a review of related pulley lab concepts, practice problems, and quiz corrections to reinforce learning.

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Understanding Mechanical Advantage and the Unique Properties of Osmium

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Presentation Transcript

  1. Warm up 5/08/13 • Question: A machine lets you use 5 N of force to lift an object that weights 10 N – What is its MA? • Answer: • MA =output force / input force • MA = 10 N / 5N = 2 • Goal: I will calculate mechanical advantage.

  2. Element of the day • 76 – Osmium – Os • Osmium is the hardest metal element, and is at least as expensive as rhenium. • Osmium and iridium are alloyed in an incredibly hard and wear resistant material that was used in fountain pens and phonograph needles. • Osmium powder reacts with the air to produce a vapor called osmium tetroxide which is deadly. • Osmium is the densest element.

  3. Review Pulley Lab • Notes 9.2 • MA packet. MA problems. • Quiz Corrections • Tonight’s HW • MA problems • Quiz Corrections Agenda / HW

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