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PROBLEM 15.122 (Continued)
PROBLEM 15.123
The disk shown has a constant angular velocity of 500 rpm counter-clockwise.
Knowing that rod BD is 10 in. long, determine the acceleration of collar D
when (a)
90 ,
θ
= °
(b)
180 .
θ
= °
PROBLEM 15.123 (Continued)
PROBLEM 15.124
Arm AB has a constant angular velocity of 16 rad/s
counterclockwise. At the instant when
90 ,
θ
= °
determine
the acceleration (a) of collar D, (b) of the midpoint G of bar
BD.
PROBLEM 15.124 (Continued)
PROBLEM 15.125
Arm AB has a constant angular velocity of 16 rad/s
counterclockwise. At the instant when
60 ,
θ
= °
determine
the acceleration of collar D.
PROBLEM 15.125 (Continued)
PROBLEM 15.126
A straight rack rests on a gear of radius r = 3 in. and is attached to
a block B as shown. Knowing that at the instant shown
θ
= 20°,
the angular velocity of gear D is 3 rad/s clockwise, and it is
speeding up at a rate of 2 rad/s2, determine (a) the angular
acceleration of AB, (b) the acceleration of block B.
PROBLEM 15.126 (Continued)
PROBLEM 15.127
The elliptical exercise machine has fixed axes of rotation at points A
and E. Knowing that at the instant shown the flywheel AB has a
constant angular velocity of 6 rad/s clockwise, determine the
acceleration of point D.
