Take the 2-minute tour ×
Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It's 100% free, no registration required.

suppose there is two point A and B they are connected by straight railway line on which there is moving locootive on figure a there is shown time graphic with relative distance S_A from point A till locooenter image description heretive

from figure B we should choose which one is graphic of the in the same process that express graph of time-distance relation from the B point to locootive measure S_B distance enter image description here

share|improve this question

1 Answer 1

up vote 3 down vote accepted

Think about this: If points A and B are, say, 3 km apart, then the distance from A to the train plus the distance from the train to B should always be 3 km. For example, if the train is 1 km from A, then it is 2 km from B. If it is 2 km from A, then it is 1 km from B. Which of the choices for graphs of S_B has the property that, for all times t, the value S_A(t) + S_B(t) is the same constant throughout?

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.