Question: The crane shown rotates at the constant rate 1 = 0.25 rad/s; simultaneously, the telescoping boom is being lowered at the constant rate 2 =

The crane shown rotates at the constant rate Ï‰1 = 0.25 rad/s; simultaneously, the telescoping boom is being lowered at the constant rate Ï‰2 = 0.40 rad/s. Knowing that at the instant shown the length of the boom is 20 ft and is increasing at the constant rate u = 1.5ft/s, determine the velocity and acceleration of Point B.

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