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Unformatted text preview: (b) How much power is required (kW) for constant velocity of 50 km/hr on an uphill road at 30 with respect to horizontal? (c) Calculate the power required (kW) when accelerating on a level road from rest to 90 km/hr in 12 seconds. SP5: 1 kg of air expands at constant temperature of 27 C in a piston-cylinder device when its specific volume changes from 0.05 m 3 /kg to 0.1 m 3 /kg. Assume that the air satisfies the relation, Pv = RT, where R = 0.287 kJ/kg-K. (a) Determine the quasistatic work done (kJ/kg) during the process. (b) What is the total work done (kJ/kg) assuming a frictional force of 5000 N acts through 0.25 m during the piston motion? (c) Is the work done to overcome the frictional force quasistatic? Explain....
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- Spring '08