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PROBLEM 18.41
Determine the kinetic energy of the assembly of Problem 18.3.
PROBLEM 18.3 Two uniform rods AB and CE, each of weight
3 lb and length 2 ft, are welded to each other at their midpoints.
Knowing that this assembly has an angular velocity of constant
magnitude
12 rad/s, determine the magnitude and direction
of the angular momentum HD of the assembly about D.
PROBLEM 18.42
Determine the kinetic energy of the disk of Problem 18.4.
PROBLEM 18.4 A homogeneous disk of weight 6lbW
rotates at the constant rate 116
rad/s with respect to arm
ABC, which is welded to a shaft DCE rotating at the constant
rate 28 rad/s.
Determine the angular momentum A
H of the
disk about its center A.
PROBLEM 18.43
Determine the kinetic energy of the disk of Problem 18.5.
PROBLEM 18.5 A thin disk of mass
4kgm
rotates at the constant
rate
2
15 rad/s
with respect to arm ABC, which itself rotates at the
constant rate
1
5rad/s
about the y axis. Determine the angular
momentum of the disk about its center C.
PROBLEM 18.44
Determine the kinetic energy of the solid parallelepiped of Problem 18.6.
PROBLEM 18.6 A solid rectangular parallelepiped of mass m has a
square base of side a and a length 2a. Knowing that it rotates at the
constant rate
about its diagonal
A
C
and that its rotation is observed
from A as counterclockwise, determine (a) the magnitude of the angular
momentum G
H of the parallelepiped about its mass center G, (b) the
angle that G
H forms with the diagonal .
A
C
PROBLEM 18.45
Determine the kinetic energy of the hollow parallelepiped of Problem
18.7.
PROBLEM 18.7 Solve Problem 18.6, assuming that the solid rectangular
parallelepiped has been replaced by a hollow one consisting of six thin
metal plates welded together.
PROBLEM 18.45 (Continued)
PROBLEM 18.46
Determine the kinetic energy of the disk of Prob. 18.8.
PROBLEM 18.47
Determine the kinetic energy of the assembly of Prob. 18.15.
PROBLEM 18.48
Determine the kinetic energy of the shaft of Prob. 18.17.
PROBLEM 18.49
Determine the kinetic energy of the assembly of Prob. 18.19.
