Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 11-science Answered

please answer this
question image
Asked by Prashant DIGHE | 22 Apr, 2020, 10:48: PM
answered-by-expert Expert Answer
when train starts from rest , moves with uniform acceleration a and attains maximum speed v , then we have
 
v2 = 2 a S1 ......................(1)
 
time taken t to attain maximum speed ,  t1 = v/a  ....................(2)
 
where S1 is distance travelled
 
After attaining maximum speed , moves with retardation a and comes to rest after travelling a distance S2 .
 
Then we have,  v2 = 2 a S2...............(3)
 
time taken t to come to rest ,  t2 = v/a  ...................(4)
 
Total distance travelled ,  S = S1 + S2 = ( v2 / 2a ) + ( v2 / 2a ) = ( v2 / a ) ................(5)
 
Total time travelled , t = t1 + t2 = (2v)/a    .................. (6)
 
using eqn.(5), we rewrite eqn.(6) as ,  begin mathsize 14px style t space equals space 2 space square root of S over a end root end style
maximum speed , begin mathsize 14px style v space equals space square root of a space S end root end style
Answered by Thiyagarajan K | 23 Apr, 2020, 08:47: AM
CBSE 11-science - Physics
Asked by corggn16 | 11 Feb, 2024, 01:22: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
Asked by sakshiiiyadav9336 | 02 Feb, 2024, 09:37: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
Asked by veenasangeeth2020 | 30 Jan, 2024, 09:56: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
Asked by dhanapolla | 28 Jan, 2024, 10:40: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
Asked by santoshyadav6673633 | 26 Jan, 2024, 04:55: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
Asked by shubham23302007 | 23 Jan, 2024, 10:24: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
Get Latest Study Material for Academic year 24-25 Click here
×