A car with 17-inch radius wheels is traveling at maximum power on a road with a...

 

 

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A car with 17-inch radius wheels is traveling at maximum power on a road with a -3% grade with a gear reduction ratio of 3.5 and driveline slippage of 1.5%. The car has a braking efficiency of 99% when antilock brakes (ABS) work, and a torque/engine speed curve of the form: Me = 7ne - 0.08ne 2 with Me in ft-lb and ne in revolutions per second. While traveling on poor, wet road, the driver spotted a stalled truck up ahead. He was able to come to a complete stop just before hitting the truck. The final 200 feet was on packed ice and the car's ABS did not work which reduced its braking efficiency to 80%. Assume frl = 0.02 when the brakes are locked. You will need to compute frl when the brakes are not locked. What is the minimum theoretical stopping distance from the stalled truck to where the driver first spotted the truck? For theoretical stopping distance, ignore air resistance. What is the car's deceleration rate in the last 200 feet? A car with 17-inch radius wheels is traveling at maximum power on a road with a -3% grade with a gear reduction ratio of 3.5 and driveline slippage of 1.5%. The car has a braking efficiency of 99% when antilock brakes (ABS) work, and a torque/engine speed curve of the form: Me = 7ne - 0.08ne 2 with Me in ft-lb and ne in revolutions per second. While traveling on poor, wet road, the driver spotted a stalled truck up ahead. He was able to come to a complete stop just before hitting the truck. The final 200 feet was on packed ice and the car's ABS did not work which reduced its braking efficiency to 80%. Assume frl = 0.02 when the brakes are locked. You will need to compute frl when the brakes are not locked. What is the minimum theoretical stopping distance from the stalled truck to where the driver first spotted the truck? For theoretical stopping distance, ignore air resistance. What is the car's deceleration rate in the last 200 feet?

Answer rating: 100% (QA)

To find the minimum theoretical stopping distance we need to consider the various factors affecting the cars braking performance 1 Grade Resistance Th... View the full answer