There was a lengthy interruption following a nasty collision between Kakuta and Steven N'Zonzi but it did not holt Chelsea's momentum and Kalou should have added a third with a free header.

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Immediately after the collision, a constant braking force of magnitude 250 N is applied to C.

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The last significant train collision involving Metro-North occurred in 1988 when a train engineer was killed in Mount Vernon, N.

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