Emma is roller skating, skating over a $0\mathrm{.}9-$m$-$tall hill. Assuming that she is moving at a speed of $4\mathrm{.}1$ 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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Al top of the hill potential energy is converted to kinetic energy mgh M ... View the full answer