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A 4 kg block is on a smooth horizontal t...

A `4 kg` block is on a smooth horizontal table. The block is connected to a second block of mass `1 kg` by a massless flexible taut cord that passes over a frictionless pulley. The `1 kg` block is `1m` above the floor. The two block are released from rest. With what speed does the `1 kg` block hit the ground?
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