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If I had a standard 'cherry-picker' type of crane (lifting device), 7' high, with a 7' boom, suspending 1000# at its end,its vertical support mounted atop a 6" diameter ball-type pivot: how much force would be required to lock this pivot in place from moving when the load is lifted? Assume all materials are mild steel.

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Some sketch would be appropriate, I do not understand the problem. I would expect some angle in the problem like that. Also, units are horrible. – Pygmalion Apr 20 '12 at 18:09
Hi vince, and welcome to Physics Stack Exchange! This is a site for conceptual questions about physics, not for homework help. If you edit your question to focus on the concept that is giving you trouble, I'll be happy to reopen it. See the FAQ and this post for more information. – David Zaslavsky♦ Apr 20 '12 at 19:13

closed as too localized by David Zaslavsky♦ Apr 20 '12 at 19:12

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