10. A rough casting for a rotor weighs 450 lb. and is mounted on centres 46 in. apart, ready for machining: it is given static balance by two masses A and B in planes which are situated 20 in. and 16 in. respectively on either side of the plane containing the mass centre. The weights of the masses A and B are 20 lb. and 24 lb. respectively, and their mass centres are at 90° to each other relative to the axis of the casting, and at 15 in. and 18 in. radius respectively. Determine the eccentricity of the mass centre of the casting, its position relative to that of mass A, and the forces on the centres when the rotor with attached masses A and B is run at 50 r.p.m. (U. Lond.)

10. A rough casting for a rotor weighs 450 lb. and is mounted on centres 46 in. apart, ready for machining: it is given static balance by two masses A and B in planes which are situated 20 in. and 16 in. respectively on either side of the plane containing the mass centre. The weights of the masses A and B are 20 lb. and 24 lb. respectively, and their mass centres are at 90° to each other relative to the axis of the casting, and at 15 in. and 18 in. radius respectively. Determine the eccentricity of the mass centre of the casting, its position relative to that of mass A, and the forces on the centres when the rotor with attached masses A and B is run at 50 r.p.m. (U. Lond.)

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

See similar textbooks

Similar questions

Find out (i) Centroid (ii) Area-moment of inertia of a triangular lamina of base b and height habout an axis passing through the centroid. PLZZZ SOLVE. THANKS!!!
5- The moment of inertia of a square of side (a) about an axis through its centre of gravity is A. a 14 B. a^/8 C. a¹/12 D. a /36 E. none of these
Hey i really need your help do it please
Calculate the moment of inertia for a cube of mass 7 kg and lenghts 260 mm, when rotating about one of the edges .
i beam questions findind moments of inertia about the horizontal and vertical axes crossing the centroid of the area
A homogeneous solid cylinder has a mass of 2 kg , a radius of 0.05 m and length of 1m. Calculate the moment of inertia about an axis perpendicular to the cylinder and placed 15 cm from one end (i.e. 35 cm from the center of gravity).
Please answer with explanation. ASAP I will really upvote. Thanks
i need the answer quickly
1. A circular disk has a density p(r) which varies as a function of distance from the center of the disk. The disk has a radius R and a thickness t. Assuming p(r) = Po(1-r/R): Calculate the total mass of the disk. a. b. Calculate the moment of inertia of the disk about an axis out of the plane of the page and passing through Point G. C. Calculate the moment of inertia of the disk about an axis out of the plane of the page and passing through Point O. G R
Assignment 10: Moment of Inertia Tensor 121 The moment of inertia of a hollow cylinder of mass M and inner radius Rl and outer radius R2 abouts its central axis is 25. (a) M (R; - R;) (h);M(R? + R}) (c) M(R; – R?) () M(R, --R,}
Steiner’s theorem and gyration radius. A metal tank wheel in the shape of a disc of radius R is lightened by cutting out six identical through- holes in the shape of discs, whose axes are parallel to the wheel’s axis of rotation, and whose radii are all r. The holes’ centers are positioned at the vertices of a regular hexagon of side A, with the wheel’s axis passing through the center of the hexagon. By what percentage is the wheel’s moment of inertia decreased around its rotation axis, as a result of the cut outs, for r=R/5 and A=3R/5? Is the solution: 18.24% (using negative mass for cutouts and parallel axis theorem)?
Moment of inertia of a square about its centroidal axis increases with increase in side of the square. Justify this statement.