a. Find the volume of the parallelepiped whose edges are represented by A = 2i - 3j + 4k, B= 1 + 21- k, Č = 31 - 1 + 2k . ii. b. The angular velocity of a rotating rigid body about an axis of rotation is given by = 4i +j - 2k. Find the linear velocity of a point P on the body whose position vector relative to a point on the axis of rotation is 21-3j+k.

Elements Of Electromagnetics
7th Edition
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Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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Problem 1.1MA
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-10
10
40
a. Find the volume of the parallelepiped whose edges are represented by A = 2i - 3j + 4k,
ii.
B = 1+ 2) - k, C = 31 - 1 + 2k .
b. The angular velocity of a rotating rigid body about an axis of rotation is given by ai = 4i +j -
2k. Find the linear velocity of a point P on the body whose position vector relative to a point on
the axis of rotation is 2i-3j+k.
ii. Find the moment of inertia tensor from the given picture.
300 mm
P.T.O.
iv.
Given point P = (1, -2, 3) and vector A = yz i+x1- yx k , express this vector in cylindrical
coordinate system.
V.
a. Show that the contraction of the outer product of the tensors AP and B, is an invariant.
b. Show that every tensor can be expressed as the sum of two tensors, one of which is
symmetric and the other skew-symmetric in a pair of covariant or contra variant indices.
vi. The 4-oz top with radius of gyration about its spin axis of 0.62 in. is spinning at the rate p =
3600 rev/min in the sense shown, with its spin axis making an angle e = 20° with the vertical.
The distance from its tip O to its mass center G is r = 2.5 in. Determine the precession 2 of the
top and explain why O gradually decreases as long as the spin rate remains large. An enlarged
view of the contact of the tip is shown.
Enlargod viow
of tip contact
vii.
Find the S.F. and B.M. of the beam given below and draw it.
50 KN
10 KNm
140 kN
2m +le
4m
- 4 m
A hollow steel shaft transmits 200 kW of power at 150 rpm. The total angle of twist in a length
of 5 m of the shaft is 5". Find the inner and outer diameter of the shaft if the permissible share
viii.
stress is 60 GPa and rigidity modulus is 80 GPa.
Two identical blocks A and B are connected by a rod and rest against vertical and horizontal
planes, respectively, as shown in fig. If sliding impends when O = 45°, determine the coefficient
of friction u, assuming it to be the same at both floor and wall.
Transcribed Image Text:-10 10 40 a. Find the volume of the parallelepiped whose edges are represented by A = 2i - 3j + 4k, ii. B = 1+ 2) - k, C = 31 - 1 + 2k . b. The angular velocity of a rotating rigid body about an axis of rotation is given by ai = 4i +j - 2k. Find the linear velocity of a point P on the body whose position vector relative to a point on the axis of rotation is 2i-3j+k. ii. Find the moment of inertia tensor from the given picture. 300 mm P.T.O. iv. Given point P = (1, -2, 3) and vector A = yz i+x1- yx k , express this vector in cylindrical coordinate system. V. a. Show that the contraction of the outer product of the tensors AP and B, is an invariant. b. Show that every tensor can be expressed as the sum of two tensors, one of which is symmetric and the other skew-symmetric in a pair of covariant or contra variant indices. vi. The 4-oz top with radius of gyration about its spin axis of 0.62 in. is spinning at the rate p = 3600 rev/min in the sense shown, with its spin axis making an angle e = 20° with the vertical. The distance from its tip O to its mass center G is r = 2.5 in. Determine the precession 2 of the top and explain why O gradually decreases as long as the spin rate remains large. An enlarged view of the contact of the tip is shown. Enlargod viow of tip contact vii. Find the S.F. and B.M. of the beam given below and draw it. 50 KN 10 KNm 140 kN 2m +le 4m - 4 m A hollow steel shaft transmits 200 kW of power at 150 rpm. The total angle of twist in a length of 5 m of the shaft is 5". Find the inner and outer diameter of the shaft if the permissible share viii. stress is 60 GPa and rigidity modulus is 80 GPa. Two identical blocks A and B are connected by a rod and rest against vertical and horizontal planes, respectively, as shown in fig. If sliding impends when O = 45°, determine the coefficient of friction u, assuming it to be the same at both floor and wall.
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