Question

Problem 6: A light-rail commuter train accelerates at a rate of 1.35 m/s2 . i. How long does it take to reach its top speed of 80.0 km/h, starting from rest? ii. The same train ordinarily brakes at a rate of ?1.65 m/s2 . How long does it take to come to a stop from its top speed? iii. In emergencies, the train can brake more rapidly, coming to rest from 80.0 km/h in 8.30 s. What is its emergency acceleration in meters per second squared?

Name: problem 6 a light rail commuter train accelerates at a rate of 135 ms2 i how long does it take to reach its top speed of 800 kmh starting from rest ii the same train ordinarily brakes at a rate of 165
Uploaded: 2021-11-05T19:35:43-08:00
Duration: 2 min 49 s
Channel: Nishant Kumar
Description: problem 6 a light rail commuter train accelerates at a rate of 135 ms2 i how long does it take to reach its top speed of 800 kmh starting from rest ii the same train ordinarily brakes at a rate of 165

          Problem 6: A light-rail commuter train accelerates at a rate of 1.35 m/s2
.
i. How long does it take to reach its top speed of 80.0 km/h, starting from rest?
ii. The same train ordinarily brakes at a rate of ?1.65 m/s2
. How long does it take to come to
a stop from its top speed?
iii. In emergencies, the train can brake more rapidly, coming to rest from 80.0 km/h in
8.30 s. What is its emergency acceleration in meters per second squared?

Added by Yousef N.

University Physics Volume 1

Samuel J. Ling, Jeff Sanny, William… 1st Edition

Chapter 3

Instant Answer

Solved by Expert Nishant Kumar

11/05/2021

Step 1

0 km/h starting from rest. Given: Initial velocity (u) = 0 m/s Final velocity (v) = 80.0 km/h = 22.22 m/s Acceleration (a) = 1.35 m/s^2 Use the equation of motion: v = u + at 22.22 = 0 + 1.35t t = 22.22 / 1.35 t = 16.5 seconds Show more…

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Problem 6: A light-rail commuter train accelerates at a rate of 1.35 m/s2 . i. How long does it take to reach its top speed of 80.0 km/h, starting from rest? ii. The same train ordinarily brakes at a rate of ?1.65 m/s2 . How long does it take to come to a stop from its top speed? iii. In emergencies, the train can brake more rapidly, coming to rest from 80.0 km/h in 8.30 s. What is its emergency acceleration in meters per second squared?