Saturday
August 2, 2014

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

Answer this Question

First Name:
School Subject:
Answer:

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 - Train A and B are traveling in the same direction on parallel tracks. ...
algebra - Trains A and B are traveling in the same direction on parrallel tracks...
math - Trains A and B are traveling in the same direction on parrallel tracks. ...
ALGEBRA-MAT117 - Trains A & B are traveling if the same direction on parallel ...
algebra - Trains A and B are traveling in the same direction on parrallel ...

Search
Members