Kinetic Energy 44. Rigid rods of negligible mass lying along the y axis con- W nect three particles (Fig. P10.44). The system rotates about the x axis with an angular speed of 2,00 rad/s. Find (a) the moment of iner- tia about the x axis, (b) the total rotational kinetic energy evaluated from lo, (c) the tangential speed of cach particle, and (d) the total kinetic energy evaluated from 3.00 kg Eim,u. (e) Compare the answers for kinetic energy in 4.00 kg y 3.00 m 2.00 kg y-2.00 m 4.00 m parts (a) and (b). Figure P10.44

Kinetic Energy 44. Rigid rods of negligible mass lying along the y axis con- W nect three particles (Fig. P10.44). The system rotates about the x axis with an angular speed of 2,00 rad/s. Find (a) the moment of iner- tia about the x axis, (b) the total rotational kinetic energy evaluated from lo, (c) the tangential speed of cach particle, and (d) the total kinetic energy evaluated from 3.00 kg Eim,u. (e) Compare the answers for kinetic energy in 4.00 kg y 3.00 m 2.00 kg y-2.00 m 4.00 m parts (a) and (b). Figure P10.44

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter10: Rotational Motion

Section: Chapter Questions

Problem 67P: Two astronauts (Fig. P10.67), each having a mass of 75.0 kg, are connected by a 10.0-m rope of...

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A space station is coast me ted in the shape of a hollow ring of mass 5.00 104 kg. Members of the crew walk on a deck formed by the inner surface of the outer cylindrical wall of the ring, with radius r = 100 m. At rest when constructed, the ring is set rotating about its axis so that the people inside experience an effective free-fall acceleration equal to g. (Sec Fig. P11.29.) The rotation is achieved by firing two small rockets attached tangentially to opposite points on the rim of the ring, (a) What angular momentum does the space station acquirer (b) For what time interval must the rockets be fired if each exerts a thrust of 125 N?