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Question: A 27.0-kg child on a 1.00-m-long swing is released from rest when the ropes of the swing make an angle of 27.0° with the vertical.
Part I: Neglecting friction, find the child's speed at the lowest position.
m/s
Part II: If the actual speed of the child at the lowest position is 1.30 m/s, what is the mechanical energy lost due to friction?
J
If possible just a brief explanation how you got the answer?
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