A subway train starts from rest at a station and accelerates at a rate of 2.50 m/s2 for 15.90 seconds. It then runs at a constant speed for 35 seconds and then slows down at a rate of 4.50 m/s2 until it stops at the next station. (a) What is the speed of the train just before it starts slowing down? (Ans.: = 39.75 m/s) (b) How long did it take the train to finish the trip from one station to the other? (Ans.: = 59.73 s)
A subway train starts from rest at a station and accelerates at a rate of 2.50 m/s2 for 15.90 seconds. It then runs at a constant speed for 35 seconds and then slows down at a rate of 4.50 m/s2 until it stops at the next station. (a) What is the speed of the train just before it starts slowing down? (Ans.: = 39.75 m/s) (b) How long did it take the train to finish the trip from one station to the other? (Ans.: = 59.73 s)
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter2: Motion In One Dimension
Section: Chapter Questions
Problem 55AP: A truck tractor pulls two trailers, one behind the other, at a constant speed of 1.00 102 km/h. It...
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2. A subway train starts from rest at a station and accelerates at a rate of 2.50 m/s2 for
15.90 seconds. It then runs at a constant speed for 35 seconds and then slows down at
a rate of 4.50 m/s2 until it stops at the next station.
(a) What is the speed of the train just before it starts slowing down?
(Ans.: = 39.75 m/s)
(b) How long did it take the train to finish the trip from one station to the other?
(Ans.: = 59.73 s)
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