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Arollercoasterdescends35metersfromtherestinitsinitialdropandthenrises23metersbeforegoingover thefirsthill.Ifintheprocess20 % ofmechanicalenergyislostduetofriction,whatisthespeedofthecoaster atthetopofthefirsthill? Assumepotentialenergytobezeroatthegroundlevel . The correct answer is approximately 9.9 m/s

Arollercoasterdescends35metersfromtherestinitsinitialdropandthenrises23metersbeforegoingoverthefirsthill.Ifintheprocess20%ofmechanicalenergyislostduetofriction,whatisthespeedofthecoasteratthetopofthefirsthill?Assumepotentialenergytobezeroatthegroundlevel.

The correct answer is approximately 9.9 m/s

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