A marble slides without friction in a vertical plane

Reference no: EM13564664

A marble slides without friction in a vertical plane around theinside of a smooth, 21 {\rm cm}-diameter horizontal pipe. The marble's speed at the bottom is 4.5 {\rm {m}/{s}} this is fast enough sothat the marble makes a complete loop, never losing contact withthe pipe.
What is its speed at the top?

Reference no: EM13564664

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