For seesaws, downward moments are the same as upward moments:
We'll take the moments about the edge of the table.
m1 = [(30.0)/(30.0 + 20.0)](6.50) = 3.9kg
This acts at the center of 30.0cm on the left.
Thus, m1r1 = (3.9)(0.15) = 0.59 kg•m
A thin 3.00 kg box rests on a 6.50 kg board that hangs over the end of a table, as shown in the figure
How far can the center of the box be from the end of the table before the board begins to tilt?
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What scientific concept do you need to know in order to solve this problem?
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Based on our data, we think this problem is relevant for Professor DeJonghe's class at UIC.