Homework Help: physics

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

No one has answered this question yet.

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 ...
algebra 1b - the speed of a passenger train is 18mph faster than the speed of a ...
Algebra - Is there an easier way to do this? "A freight train leaves a ...
Math - 5) A freight train leaves a station traveling at 32 km/h. Two hours later...
Algebra - Speed of passenger train is 6mph faster than the freight train. The ...
algebra - a passenger train's speed is 60mi/h, and a freight train's ...
algebra - a passenger train traveling at 50 mph leaves the station 6 hours after...
algebra - the speed of a passenger train is 20mph faster than the speed of a ...

For Further Reading

First Name:
School Subject:
Answer: