Two different amusement park rides are shown in the figure at the right. Each of the platforms is supported on frictionless pins by a pair of arms. All of the arms supporting the platforms rotate at the same angular velocity w. Compare the kinetic energies of the two identical platforms P and Q. Which is correct? Platform P has greater kinetic energy. Platform Q has greater kinetic energy. The kinetic energy of the platforms will be the same. Each will have zero kinetic energy. Not enough information is given.

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Forms of Energy

Energy is described as the capability to accomplish a task, like the ability to push a block by applying force on it. It is a quantitative property that is used to accomplish work on an object.