This preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: The thin rod has a mass of 0.8 kg and a total length of
150 mm. It is rotating about its midpoint at a constant rate
while the table to which its axle A is fastened is rotating at
2 rad/s. Determine the x, y, z moment components which the
axle exerts on the rod when the rod is in any position 0. 2151. The 50lb disk spins with a constant angular rate of
wl = 50 rad/s about its axle. Simultaneously, the shaft
rotates with a constant angular rate of col = 10 rad/s.
Determine the x, y, z components of the moment developed in the arm at A at the instant shown. Neglect the weight of
arm AB. .7» 0.75 ft ml: 50 rad/s H y Prob. 21—51 ' The thin disk is mounted on shaft AB,
which coincides with a diametral line. Servomotors sus
tain the rotation rates 91 about this axis and $22 about
the vertical are maintained at constant values by servomo
tors that exert torques about the respective shafts. Derive
expressions for the dynamic reactions at bearings A and
B and the required moment about shaft AB as functions
of 0. It may be assumed that the bearings exert forces, but
‘ not couples, and that only the mass of the disk is signiﬁ
cant. 10” a) = 107: rad/sec The 4in.radius wheel weighs 6 lb and turns
about its y’axis with an angular velocity p = 401T
rad/sec in the direction shown. Simultaneously
the fork rotates about its xaxis shaft with an an
gular velocity to = 107r rad/ sec as indicated. Cal—
culate the angular momentum of the wheel about
its center 0’. Also compute the kinetic energy of
‘the wheel. . The assembly consists of a 4kg rod AB which is
connected to link 0A and the collar at B by ball—and—socket
joints. When 0 = 0°, y = 600 mm, the system is at rest,
the spring is unstretched, and a couple moment
M = (49 + 2) N  m, where 0 is in radians, is applied to the
link at 0. Determine the angular velocity of the link at the
instant 9 = 90°. Neglect the mass of the link. Z ...
View
Full Document
 Spring '08
 Neptune
 Angular Momentum, Kinetic Energy, Rigid Body, Rotation, constant angular rate

Click to edit the document details