A 9-kg and 1.5-m uniform bar is pivoted at O and connected to a 3-kN/m spring at the midpoint. The spring is unstretched and the bar is vertically at rest. A 0.9-kg particle flies at 25 m/s, impacts and sticks to the top end of the bar. k a) Determine the angular speed of the bar just after impact. Someone claims the gravitational potential energy can be ignored when the system starts to vibrate after impact, and only kinetic and elastic potential energies need to be considered for the energy method. Do you agree? b) Determine the natural angular frequency of the vibration in the vertical plane after impact. C) Determine the reaction forces by the pivot on the bar when it passes through the vertical position during the vibration.

A 9-kg and 1.5-m uniform bar is pivoted at O and connected to a 3-kN/m spring at the midpoint. The spring is unstretched and the bar is vertically at rest. A 0.9-kg particle flies at 25 m/s, impacts and sticks to the top end of the bar. k a) Determine the angular speed of the bar just after impact. Someone claims the gravitational potential energy can be ignored when the system starts to vibrate after impact, and only kinetic and elastic potential energies need to be considered for the energy method. Do you agree? b) Determine the natural angular frequency of the vibration in the vertical plane after impact. C) Determine the reaction forces by the pivot on the bar when it passes through the vertical position during the vibration.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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