Tuesday
July 22, 2014

Homework Help: Physics

Posted by Physics on Tuesday, August 25, 2009 at 8:36pm.

I have a question
26. A box weighing 85 N rests on a table. A rope tied to the box runs vertically upward over a pully and a weight is hung form the other end. Detrmine the force that the table exerts on the box if the weight hanging on the other side of the pully weighs (a) 30 N, (b) 60 N, and (c) 90 N.

Ok well we know that the Fn of the first block is 85 N and the Fn of the other block changes so for (a) I\'m not exactly sure how to do this problem...

Do I take the Fn of the first block and the Fn of the second block and then find the Fn exerted by the table

or do I take the Fn of the first block and the Fg of the second block...

not exactly sure how to do this thanks...

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