# What Happens First ?

A block is connected to an identical block through a weightless pulley by an inextensible thread of length $$2L$$ (see figure). The left block rests on a frictionless table at a distance $$L$$ from its edge, while the right block is kept at the same level so that the thread is unstreched and does not sag, and then released. What will happen first: will the left block reach the edge of the table (and touch the pulley), or will the right block hit the table?

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