While a 1700-kg automobile is moving at a constant speed of 15 m/s, the motor supplies 16 kW of power to overcome friction, wind resistance, and so on. {a) What is the effective retarding force associated with all the frictional forces combined? (b) What power must the motor supply if the car is to move up an 8 .0 % grade (8 .0 m vertically for each 10 0 m horizontally) at 15 m/s? (c) At what downgrade, expressed in percentage terms, would the car coast at 15 m/s?

Ashhfaq , 5 Years ago

Grade 12th pass