Posted by **Peter Adrian Ngo** on Sunday, March 20, 2011 at 3:38am.

A car going 50mi/h overtakes and passes another car moving at 45 mi/h. what length of road is required for the operation? assume that each car is 15 ft long and that there is a 60-ft space between them before and after passing. taking into account the approach of a car from the opposite direction at 50 mi/h, what clear length of road is required?

- Physics -
**drwls**, Sunday, March 20, 2011 at 8:06am
One car passes the other at a relative rate of 5 mph = 7.333 ft/s, and must change the distance between them by 60 + 60 + 15 = 135 feet before returning to the right side of the dividing line. The time required for the entire passing maneuver is 135/7.333 = 18.41 s. An oncoming car approaches the passing car at a relative rate 100 mph = 146.7 ft/s. The clear length of road required to avoid a collision is

146.7 x 18.41 = 2700 feet, which is over half a mile.

- Physics -
**vdes**, Tuesday, August 5, 2014 at 9:17am
12

## Answer this Question

## Related Questions

- physics - Just as a car starts to accelerate from rest with an acceleration of 1...
- Physics - a car and a truck start from rest at the same instant with the car ...
- Math - A car is going 50mi/h after 5s. The car is traveling 30mi/h about how ...
- Physics - A truck travels at a constant speed of 28.0 m/s in the fast lane of a ...
- Physics - An 893 kg car passes over a bump in a road that follows the arc of a ...
- physics - A loaded truck is going at a speed of 36 km/hr and a car starts at ...
- physics - At the moment car A is starting from rest and accelerating at 5.0 m/s2...
- physics - As a traffic light turns green, a waiting car starts with a constant ...
- physics - A truck is traveling with a uniform velocity 24 m/s, when it passes a ...
- Physics - A car travels at 64 mi/h when the brakes are suddenly applied. ...

More Related Questions