A driver is traveling at 80 kph on a wet road. An object is spotted on the road 125 m ahead and the driver is able to come to a stop just before hitting the object. Assuming standard perception/reaction time, determine the grade of the road.
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A driver is traveling at 80 kph on a wet road. An object is spotted on the road 125 m ahead and the
driver is able to come to a stop just before hitting the object. Assuming standard perception/reaction
time, determine the grade of the road.
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- Sight Distance A driver is traveling at 55 mi/h on a wet road. An object is spotted on the road 450 ft ahead and the driver is able to come to a stop just before hitting the object. Assuming standard perception/reaction time, determine the grade of the road.A driver is traveling at 52 mi/h on a wet road. an object is spotted on the road 415 ft ahead and the driver is able to come to a stop just before hitting the object. assuming standard perception/ reaction time and practical stopping distance, determine the grade of the road.The driver of a car travelling at a certain speed suddenly sees an obstruction ahead and travelled a distance of 55.8 m during the perception time of 1.45 sec. Determine the car's speed of approach in kph.
- A driver driving at 69 kph at a straight flat portion of the highway suddenly encounters an obstruction. He applies his brakes. If the coefficient of friction of the roadway to the tires is equal to 0.5, calculate the maximum safe distance (rounded to the nearest meters) the driver can apply his brakes to avoid collision. g = 9.81 m/s^2One of the two motor vehicles is moving up the ramp at 90 km / h on a road with a slope of 3%, the other goes down the ramp at a speed of 20 km / h on the opposite lane. What should be the shortest distance for two vehicle drivers to see each other in order to prevent collision by braking? The reaction time is 2.0 seconds and the sliding friction coefficient is 0.25.A driver travelling at 50 mph sees a wall at a certain distance ahead. The driver applies the brakes immediately (perception time is 2.5 seconds) and begins slowing the vehicle at 6 m/sec^2. If the distance from the stopping point to the wall is 12 m, how far was the car from the wall upon perception?
- A motorist is traveling at 54kph when she observes that a traffic light 240 m ahead of her turns red. If the motorist wishes to pass the light without stopping just as it turns green again, determine (a) the required uniform deceleration of the car, (b) the speed of the car as it passes the light.A driver with a reaction time of 2.0 second is driving downhill on a 2% grade when suddenly a cat steps from behind a parked car in the path of the driver at a distance of 32m. In which scenario can the driver stop the car in time?The distance traversed during perception-reaction time is equal to 10 meters if the speed of the car is 10 meters per second, and the perception-reaction time of the driver is 1 second. TRUE OR FALSE
- A vehicle is moving along a straight line having an initial speed of 10 m/s. It is experiencing a deceleration of -0.5v2 m/s2 . Determine the distance travelled by the vehicle after three seconds.A driver is traveling at 45 mi/h and has a perception-reaction time of 3 seconds. A deer is spotted at a distance of 380 ft ahead and the driver is able to come to a stop just before hitting the deer. Assuming practical stopping distance, what is the grade of the road in percent?9.An alert driver (with a reaction time 0.5 second) is driving uphill on a 4% grade at 36 km/h on a dry pavement when suddenly a person steps from behind a parked car in the path of the driver. The coefficient of friction of the pavement is 0.7. How long is the stopping distance of the car? A. 12.73m B. 11.89m C. 21.86m D. 20.24m