A train starts from rest and accelerates uniformly, until ithas traveled 5.6 km and acquired a velocity of 42 m/s. Thetrain then moves at a constant velocity of 42 m/s for 420 s.

glasskerfu

glasskerfu

Answered question

2021-02-21

A train starts from rest and accelerates uniformly, until ithas traveled 5.6 km and acquired a velocity of 42ms. Thetrain then moves at a constant velocity of 42ms for 420s. The train then slows down uniformly at 0.065ms2, untilit is brought to a hault. The acceleration during the first 5.6km of travel is closest to:
a) 0.19ms2
b) 0.14ms2
c) 0.16ms2
d) 0.20ms2
e) 0.17ms2

Answer & Explanation

hosentak

hosentak

Skilled2021-02-22Added 100 answers

here is a problem with a train in motion & the accfor the 1st 5.6km is asked so you don't have to think of the later part.concentrate on the givendata:--
1. initial velocity=0ms(u)
2. final velocity=42ms(v)
3. distance=5.6km=5600m(s)
so put it in the formula--v2=u2+2(a)
(s) & the ans will be (c) 0.16ms

Do you have a similar question?

Recalculate according to your conditions!

Ask your question.
Get an expert answer.

Let our experts help you. Answer in as fast as 15 minutes.

Didn't find what you were looking for?