Helen asked her mom to take her to the play ground near her house. She loves to scare her mom by going gown the tallest, wavy, frictionless slide. Sitting at the top of the slide that is 3.30 m high. She starts from rest. If the mass of Helen is 20.4 kg. What is her speed when she reaches the bottom of the slide? Please use 9.80 m/s^2

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