The crane has a boom of length 24 m and is revolving about the vertical axis at the

Chapter 7, Problem 7/21

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The crane has a boom of length 24 m and is revolving about the vertical axis at the constant rate of 2 rev/min in the direction shown. Simultaneously, the boom is being lowered at the constant rate 0.10 rad/s. Calculate the magnitudes of the velocity and acceleration of the end P of the boom for the instant when it passes the position 30. 7/21

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