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Elastic Modulus - Introductory Biomechanics - Past Exam Paper, Exams of Biomedical Engineering

Main points of this past exam are: Elastic Modulus, Simple Experimental, Method, Static Friction, Placing, Block, Horizontal Plate, Starts Sliding, Block Starts, Plate Makes

Typology: Exams

2012/2013

Uploaded on 05/06/2013

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Download Elastic Modulus - Introductory Biomechanics - Past Exam Paper and more Exams Biomedical Engineering in PDF only on Docsity! Page 1 of 3 CORK INSTITUTE OF TECHNOLOGY INSTITIÚID TEICNEOLAÍOCHTA CHORCAÍ Autumn Examinations 2007/08 Module Title: Introductory Biomechanics Module Code: BIOE6002 School: Mechanical & Process Engineering Programme Title: Bachelor of Engineering in Biomedical Engineering Programme Code: EBIME_7_Y1 External Examiner(s): Mr. M. Murphy, Dr. G. McGuiness Internal Examiner(s): Dr Keith Bryan Instructions: Answer 3 Questions All questions carry equal marks Duration: 2 hours Sitting: Autumn 2008 Requirements for this examination: Note to Candidates: Please check the Programme Title and the Module Title to ensure that you are attempting the correct examination. If in doubt please contact an Invigilator. Page 2 of 3 1. (a) Figure Q1(a) shows a simple experimental method to determine the coefficient of static friction between surfaces in contact. This method is applied by placing a block on a horizontal plate, tilting the plate slowly until the block starts sliding over the plate, and recording the angle the plate makes with the horizontal at the instant when the sliding occurs. This critical angle (θc) is called the angle of repose. Through force equilibrium, show that the coefficient of static friction just before motion starts is µ = tan θc. (10 marks) (b) A block of mass 50kg just starts to move when placed on a plane inclined at 20° to the horizontal. (i) Calculate the coefficient of static friction. (ii) Find the horizontal force required to just start the trolley moving along the level if µ is unaltered. (10 marks) 2. The uniform, horizontal beam shown in Figure Q2 is hinged to the ground at A. A frictionless roller is placed between the beam and the ceiling at D to constrain the counter-clockwise rotation of the beam about the hinge joint. A force that makes an angle β = 60˚ with the horizontal is applied at B. The magnitude of the applied force is P = 1000N. Point C represents the centre of gravity of the beam. The distance Between A and B is l = 4m and the distance between A and D is d = 3m. The Beam weighs W = 800N. Calculate the reactions on the beam at A and D. (20 marks) Figure Q1(a) Figure Q2
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