Question: Emma is roller skating, skating over a 0 . 9 - m - tall hill. Assuming that she is moving at a speed of 4

Emma is roller skating, skating over a 0.9-m-tall hill. Assuming that she is moving at a speed of 4.1 m/s at the top of the
peak, what is her speed when she reaches level ground at 0 m? Assuming that friction is negligible.
  

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