Determine the largest value of force, Mechanical Engineering

Do not round intermediate calculations; however for display purposes report intermediate steps rounded to four significant figures. Give your final answer(s) to three significant figures.

The ball of a trailer hitch is subjected to a force F. If failure occurs when the moment of F about point A reaches 11250 in.·lb, determine the largest value  F may have and specify the value of α   for which the moment about  A  is the largest.

Note that the value of F you determine must not produce a moment about A  that exceeds 11250 in.·lb  for any possible value of α.

F   =  lb

 α   = °

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