Question

Big Ben, the Parliament tower clock in London, has hour and minute hands with lengths of 2.70 m and 4.50 m and mass of 600 and 100 , respectively. Calculate the total nga momentu of these hands about the center point. You may model the hands as long, thin rods rotating about one end. Assume the hour and minute and are rotating at a constantmate of one revolution per 12 hours and 60 minutes, respectively) magnitude kgm/s direction --Select-

Answer 1

19 20 28 29 30 - 18 19 मई MAY 25 26 27 28 29 30 विजया बैंक VIJAYA BANK 136/230 Week 20 moment of intertia of thin rod me end = M2Z about moment of inertia of hour hands. fi - (60 ( 2.72 I g-m2 Moment of inertia of minute hand I (100) (4.52 kgmr 3 » Angular speed of hour hand wi=21m, = 21 (360X12) rid/sec Angular speed of minute hand W₂ = 21902 = 211 (xh) rad/sec. Total angular momentum – I With Wz. =(60)(2.7)20 (360o xiv) (1o) (45) x 21 (texto). o 1. 1gg Kgm² Is. (-ve zaxis Direction - kwird. are ho anis direction direction).. 2012