Posted by **laura** on Thursday, August 18, 2011 at 2:16am.

A passenger train is traveling at 30 m/s when the engineer sees a freight train 357 m ahead of his train traveling in the same direction on the same track. The freight train is moving at a speed of 5.9 m/s.

(a) If the reaction time of the engineer is 0.43 s, what is the minimum (constant) rate at which the passenger train must lose speed if a collision is to be avoided?

m/s2

(b) If the engineer's reaction time is 0.87 s and the train loses speed at the minimum rate described in Part (a), at what rate is the passenger train approaching the freight train when the two collide?

m/s

(c) For both reaction times, how far will the passenger train have traveled in the time between the sighting of the freight train and the collision?

km

- physics -
**Anonymous**, Sunday, August 31, 2014 at 8:13pm
23322

## Answer this Question

## Related Questions

- physics - An engineer of a passenger train traveling at 25.0 m/s sights a ...
- Physics - the engineer of a passenger train traveling at 25.0 m/s sights a ...
- physics - The engineer of a passenger train traveling at 25.0 m/s sights a ...
- Math - 5) A freight train leaves a station traveling at 32 km/h. Two hours later...
- Physics - Some how TRAIN A travelling at 36 m/s, is accidentally sidetracked ...
- algebra 1b - the speed of a passenger train is 18mph faster than the speed of a ...
- algebra - a passenger train's speed is 60mi/h, and a freight train's speed is ...
- algebra - A passenger train's speed is 60 mi/h, and a freight train's speed is ...
- algebra - the speed of a passenger train is 20mph faster than the speed of a ...
- Algebra - A freight train leaves Chicago traveling West at 35 mph. An hour later...