The problem involves two trains traveling towards each other at different speeds, with the goal of determining their initial distance apart 30 minutes before they cross paths. The subject area relates to kinematics and relative velocity.
The discussion is ongoing, with various interpretations of the problem being explored. Some participants have offered guidance on relative velocity, while others express confusion and seek further clarification on the concepts involved.
There is a mention of a potential misunderstanding regarding the problem's requirements, and some participants indicate that they misread the initial conditions. The discussion includes references to external resources for understanding relative velocity.
How far apart are the trains to begin with?chawki said:Homework Statement
One train runs from A to B at 105 miles per hour, the other runs from B to A at 85 miles per hour.
Homework Equations
How far apart were the two trains 30 minutes prior to their crossing?
The Attempt at a Solution
if the distance between them is x, i can find the time when they cross each other.
t=x/(190)
That works.supratim1 said:30 mins * relative velocity = x. won't that be the answer?
supratim1 said:so initial distance is not required!
There isn't. This is a problem about relative velocity and you have to understand what that means. Here we go. Please think about and answer the following two questions.chawki said:i still don't get it...
isn't there another method more simple?