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anonymous
 4 years ago
A train slows down at a constant rate as it
rounds a sharp circular horizontal turn. Its
initial speed is not known. It takes 18.1 s to
slow down from 80 km/h to 33 km/h. The
radius of the curve is 163 m.
As the train goes around the turn, what is
the magnitude of the tangential component of
the acceleration?
Answer in units of m/s2
anonymous
 4 years ago
A train slows down at a constant rate as it rounds a sharp circular horizontal turn. Its initial speed is not known. It takes 18.1 s to slow down from 80 km/h to 33 km/h. The radius of the curve is 163 m. As the train goes around the turn, what is the magnitude of the tangential component of the acceleration? Answer in units of m/s2

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anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0So its represented by a change in distance over time.... therefore 80(33km/hr)/18.1 s thn convert because its asking for m/s^2

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0(13.06m/s)/18.1s = .721 ms^2

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Then As the train goes around the turn, what is the sign of the tangential component of the acceleration? Take the direction in which the train is moving to be the positive direction. I just use the sign of the previous answer which is positive? right?

TuringTest
 4 years ago
Best ResponseYou've already chosen the best response.11) this is not a question of distance 2) you can't just divide by time again to get m/s^2, you need to follow the physics all acceleration is in m/s^2 in SI units the formula you need here seems to be\[a_{tan}=\frac{\Delta v}{\Delta t}\]

TuringTest
 4 years ago
Best ResponseYou've already chosen the best response.1...not sure why the radius of the curve is given

TuringTest
 4 years ago
Best ResponseYou've already chosen the best response.1note: you will need to convert km/hr into m/s

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0isnt the velocity 80km/hr  33km/hr ????

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.047 km/hr converts to 13.06 m/s

TuringTest
 4 years ago
Best ResponseYou've already chosen the best response.1that is delta v, but you said that was distance in your answer and yes to your conversion, so I guess you had the right answer, you just phrased it strangely for me looks good now though :D

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0I just spoke incorrectly... thankyou

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0what about the second part of the question

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0It will be negative because it slows the train.
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