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**1. Homework Statement**

A bar (lo = 10mm) is moving along the x axis with speed v according to a referential R.

Meanwhile a table, paralel to the bar is moving along the z axis, with speed u. There's a circular hole in the table with radius = 5mm.

From R perspective the bar has l < 10mm and it fits the hole on the table. But, from the point of view of R', resting in relation to the bar, the hole is smaller than the length of the bar.

A. Does it make sense to ask how the bar fits in the hole? Explain

B. show that in R' the bar and the table are no longer paralel, and theres a angle A between them and tg(A) = uvg/c², g= sqrt(1/(1-v²/c²))

C. show that the point C, in the middle of the whole approaches the point B, in the middle of the bar following the line z'=-u/gv x'

**2. Homework Equations**

**3. The Attempt at a Solution**

Im really clueless here. Anyone care to explain this problem to me?