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A train, starting from rest from station A, travels along a straight horizontal track...

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saj-94 | (Level 1) Salutatorian

Posted August 1, 2013 at 11:00 PM via web

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A train, starting from rest from station A, travels along a straight horizontal track until it stops at station B, which is 2400 m from A. Initially, the train accelerates at a uniform rate of 0·4 ms–2 until it reaches a speed of 16 ms–1. It then maintains this speed of 16 ms–1 for T s, before decelerating uniformly to rest in 20 s.

Draw a sketch of the v-t graph for the journey from A to B.

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jeew-m | College Teacher | (Level 1) Educator Emeritus

Posted August 1, 2013 at 11:16 PM (Answer #1)

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The previous part of the question is answered in http://www.enotes.com/homework-help/train-starting-from-rest-from-station-travels-445832

The motion of the train has three stages .

At the first stage it accelerates from rest and reach 16m/s within 40s.

At the second stage if maintains its speed of 16m for T seconds.

At the final stage it decreasing speed to  rest by deceleration within 20s.

The velocity time graph attached in the image.

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