A 40 cm long metal bar with mass 20 grams is attached to a pivot with a massless string 50 cm long.Find the kinetic energy of the bar when it is rotated at a rate of 4 revolutions per second.stringbarPivot lineergs Note: In the text, all questions use 62.5 pounds/ft as the force per volume density of water.In metric, we would need Newtons/meter. The mass density per volume of water is 1000 kg/m³.To convert this into a force density per volume, we multiply by gravity, approximately 9.8 m/s?. Theresulting quantity is the force density per volume in metric: 9800 N/m³.

Given- Mass of bar m=20 gm=20×10-3 kg Rotation ω=4 rev/s=4×3.14=12.56 rad/s

A 40 cm long metal bar with mass 20 grams is attached to a pivot with a massless string 50 cm long. Find the kinetic energy of the bar when it is rotated at a rate of 4 revolutions per second. string bar Pivot line ergs

A 40 cm long metal bar with mass 20 grams is attached to a pivot with a massless string 50 cm long. Find the kinetic energy of the bar when it is rotated at a rate of 4 revolutions per second. string bar Pivot line ergs

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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A 40 cm long metal bar with mass 20 grams is attached to a pivot with a massless string 50 cm long.
Find the kinetic energy of the bar when it is rotated at a rate of 4 revolutions per second.
string
bar
Pivot line
ergs

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