If the student generated a 19Nm torque for 4.0s to a wheel with a mass of 4.0kg and a radius 0.30m, What would be the resulting final angular momentum and rotational kinetic energy?
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- How much mechanical energy is there in a 90.0 kg footballer whose center of gravity is 90.0 cm high and whose speed is 9.00 m / s (ignores the rotational energy)?Is rotational kinetic energy a vector? Justify your answer.A flywheel is a solid disk that rotates about an axis that is perpendicular to the disk at its center. Rotating flywheels provide a means for storing energy in the form of rotational kinetic energy and are being considered as a possible alternative to batteries in electric cars. The gasoline burned in a 492-mile trip in a typical midsize car produces about 3.30 x 10° J of energy. How fast would a 26.8-kg flywheel with a radius of 0.315 m have to rotate to store this much energy? Give your answer in rev/min. Number 6640184.43 Units rev/min
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