2) [25] You are riding a bike equipped with a fluid bike trainer. Your feet are...

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2) [25] You are riding a bike equipped with a "fluid bike trainer." Your feet are doing 220 W of work per time on the pedals, and you can assume that all that power is transmitted into the inside of the fluid bike trainer. a) The outside of the bike trainer is cooled by convection with room air, and the convective heat transfer coefficient is 100 W/(m2 K). The room air is at 300 K. The external surface area of the bike trainer is 0.09 m2. Find the temperature of the outside surface of the bike trainer at steady state, i.e. where the energy input and energy output are equal in magnitude. b) Estimate the average force you are exerting on each pedal, if the pedal is rotating in a circle of radius 0.175 m, with a frequency of 80 revolutions per minute. 2) [25] You are riding a bike equipped with a "fluid bike trainer." Your feet are doing 220 W of work per time on the pedals, and you can assume that all that power is transmitted into the inside of the fluid bike trainer. a) The outside of the bike trainer is cooled by convection with room air, and the convective heat transfer coefficient is 100 W/(m2 K). The room air is at 300 K. The external surface area of the bike trainer is 0.09 m2. Find the temperature of the outside surface of the bike trainer at steady state, i.e. where the energy input and energy output are equal in magnitude. b) Estimate the average force you are exerting on each pedal, if the pedal is rotating in a circle of radius 0.175 m, with a frequency of 80 revolutions per minute.

Answer rating: 100% (QA)

a To find the temperature of the outside surface of the bike trainer at steady state we need to use the equation for convective heat transfer Q h A Ts... View the full answer