Define what is the kinetic energy in joules of this baseball

Reference no: EM13285906

A baseball weighs 5.17oz . What is the kinetic energy in joules of this baseball when it is thrown by a major-league pitcher at 91.0mph ?
By what factor will the kinetic energy change if the speed of the baseball is decreased to 55 {\rm mph}?

Reference no: EM13285906

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