Question

Question 12: In this lab we ignored the contribution to torque of the ruler that has been moved off- center. In reality, the portion of the ruler to the right of the central pivot pulls down and provides a clockwise torque, while the portion of the ruler to the left of the central pivot provides a counter clockwise torque. Describe two ways you could calculate the contribution of the ruler to the torque. You may assume you have access to a scale to determine the mass of the ruler and all objects. Question 13: Do you think the mass of your ruler actually threw off your results at all? Use numbers to support your argument. Question 14: The Archimedes' Principle is named for a story in which the ancient Greek mathematician Archimedes was asked to determine if a crown was made out of gold, or if it was partially silver. How would you go about solving this question?

Answer 1

12 If suler is moved down from one end while centre remain fixed Here position ă is perpendicular distance between contre and Force is applied in downward direction. It means their is some tooque because T= ł x angle between 8 and f is Hence e= rf edge of suler. Here 90. Ia I is inertia of moment and a is angular acceleration produced by When force applied perpendicularly to position vectus. 14 Crown Was submerged in water, then loss of weight of crown was noted. Relative density of Crown = weight loss of weight of crown in water of co crown in air ther Relative density is checked edensity of gold. If of gold, otherwise it is made of mixture of other metal- with Relative densi it comes out some crown is made