# Dynamics (Angular Velocity, Angular Acceleration)

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2 practice quiz problems which I need help on. Please give explanation of each problem as well as the answer:

1) Member AB rotates about pin A at a constant 10 rad/s. What is the acceleration of point C at the instant shown?

a) 13.4m/s^2

b) 7.51m/s^2

c) 17.2 m/s^2

d) 11.5 m/s^2

e) 9.63 m/s^2

2) Wheel A rotates counterclockwise at an angular velocity and acceleration of 3 rad/s and 1.5 rad/s2, respectively. What is the angular acceleration of bar BC?

a) .267 rad/s^2 (clockwise)

b) .500 rad/s^2 (clockwise)

c) .167 rad/s^2 (clockwise)

d) .423 rad/s^2 (clockwise)

e) .333 rad/s^2 (clockwise)

*Please see attachment for diagrams and figures!

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#### Solution Summary

The answers are explained step-by-step equationally in an attachment.

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