Question: A car has the following torque / engine - speed curve: M e = 8 . 7 n e - 0 . 0 4 6
A car has the following torqueenginespeed curve:
Where, Meis the engine torque in ftlb and n the engine
speed in revolutions per second. The car travels in the gear that
produces the maximum torque at miles per hour, its wheel radius is
in and the drive axle slippage is The drivetrain efficiency of
the car is Its weight is and travels on a track that is on
a upgrade. The car's frontal area is its drag coefficient is
and the surrounding air density is slugs
Question a What is the max torque?
Question b What is the value of the gear reduction ratio that
produces the maximum torque
Question c What is the enginegenerated tractive effort for the
previous conditions hat: in lb
Question d What is the grade resistance in lb
Question e What is the aerodynamic resistance in lb
Question f What is the rolling resistance in lb
Question g What is the acceleration of the car for the previous
conditions in ftsAssume enginegenerated tractive effort provides
the maximum tractive effort
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