Can someone help me with these first two problems? For thefirst one I think the

Question

Can someone help me with these first two problems? For thefirst one I think the answer is D, and the second one I'm not toosure about. Maybe A? Can you show me how to get the answer? Willrate LIFESAVER! http://img.photobucket.com/albums/v603/huntingrdr/scan0001.jpg Can someone help me with these first two problems? For thefirst one I think the answer is D, and the second one I'm not toosure about. Maybe A? Can you show me how to get the answer? Willrate LIFESAVER! http://img.photobucket.com/albums/v603/huntingrdr/scan0001.jpg

Explanation / Answer

The direction (and magntitude) of the reaction force can be foundby simply summing forces in the vertical direction (taking up to bepositive): R - 400 - 45 - 300 = 0 R = 745 (positive, so up)

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