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A team of four 73 kg bobsledders push their 210 kg sled over a flat frictionless surface with an initial speed of 3.5 m/s. One

A team of four 73 kg bobsledders push their 210 kg sled over a flat frictionless surface with an initial speed of 3.5 m/s. One by one, the sledders sprint 2.0 m/s faster than the sled, and then jump into the sled at 2.0 s intervals. Determine the sled's final momentum once all the sledders are in.

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