ET 321, Fall 2019
In-class Exam# 03, Total mark: 15, Time: 1 hr
Answer any three (03) questions. All questions carry equal marks.
1. A large window in the Figure is opened using a hydraulic cylinder AB. If the cylinder extends
at a constant rate of 0.5 m/s, determine the angular velocity and angular acceleration of the
window at the instant θ =30°
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2. Due to slipping, points A and B on the rim of the disk have velocities shown. Determine the
velocities of the center point C and point D at this instant.
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3. The slider block has the motion shown. Determine the angular velocity and angular
acceleration of the wheel at this instant.
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4. The pendulum in Figure is suspended from the pin at O and consists of two thin rods. Rod OA
and BC weigh 10 lb and 8 lb, respectively. Determine the moment of inertia of the pendulum
about an axis passing through (a) point O and (b) the mass center G of the pendulum.
4