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6. Review problem: A cradled DC motor dynamometer is used to test the output of a small engine. It has the following parameters Moment arm r 5.30 cm t0.05 cm (measured with a ruler) Force F : 46.5 ± 1.25 N (measured with a force scale) The rotation rate of the engine shaft is Nrpm-2012.1 ± 5.2 rpm · All measurements are to standard engineering (95%) confidence level. Calculate the engine shaft power (in units of watts) and its uncertainty

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