Please wait...
Contact Us
Contact
Need assistance? Contact us on below numbers

For Study plan details

93219 24448 / 89292 63204

10:00 AM to 7:00 PM IST all days.

For Franchisee Enquiry

81783 72169
OR

Chat with us on WhatsApp

or

Thanks, You will receive a call shortly.
Customer Support

You are very important to us

For any content/service related issues please contact on this number

93219 24448 / 99871 78554

Mon to Sat - 10 AM to 7 PM

Home / Doubts and Solutions/JEE/Physics

how to solve 2nd part

qsnImg
Asked by lakshyasaxena970 7th July 2021, 10:42 PM
Answered by Expert
Answer:
Part (a)
 
As shown in figure , Train-B has to travel a distance 500 m to overtake Train-A . 
 
Relative velocity of Train-B with respect to train-A is (40-20) = 20 m/s . 
 
Hence time taken to travel 500 m distance = distance / relative velocity = 500 / 20 = 25 s
 
--------------------------------------------------------------
 
Part (b)
 
Required acceleration a for train-B to overtake train-A in a time duration of t seconds is determined
from the following equation of motion
 
S = [ uB - uA ] t + (1/2) a t2
 
Where S is distance to be travelled, uA is the initial speed of train-A  and uB is initial speed of train-B 
 
Since both train are moving with same speed ,  [ uB - uA ] = 0
 
Hence , we have ,  S = (1/2) a t2   or      a   = ( 2 S ) / t2  
 
acceleration a = ( 2 × 500 ) / (50 × 50 ) = 0.4 m/s2
Answered by Expert 8th July 2021, 8:32 AM
Rate this answer
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10

You have rated this answer /10

Report an issue
Tags: relative-velocity
Previous Question
Next Question
Your answer has been posted successfully!

Free related questions

 A man running on a horizontal road at 8 km/hr finds the rain falling vertically. He increase the speed to 12 km/hr and finds that the drops make angle 30® with the vertical. Find the speed and the direction ofthe rain with respect to the road.
21st February 2021, 8:58 PM
Plz explain if a ball is thrown in an accelerating train, then it will fall behind or after the thrower or will return to him ?
2nd April 2021, 2:18 PM
According to relative velocity formula we know that when two bodies move towards each other the relative velocity is equal to the sum of two velocities. Then why in calculating upstream where the direction of velocity of stream is against the direction of velocity of boat in still water we subtract the former from the latter even when they are opposite to each other? 
28th May 2021, 5:20 PM
What is relative velocity
2nd July 2021, 9:04 AM
two men approach each other from opposite direction with velocity 10m/s and 15m/s . If their initial separation was 150m when and where will they meet?
8th July 2021, 7:27 AM
RELATED STUDY RESOURCES :
JEE QUESTION ANSWERS

Browse free questions and answers by Chapters

Trending Tags

balancing chemical equations cube acceleration cubic identities GST digestion hcf pythagoras theorem original fraction gravitational force

Latest Questions

CBSE X Biology
What is enzyme  
Asked by Sureshgowdayd548 28th October 2020, 10:50 PM
JEE Main Mathematics
The following pseudocode is executed using the “Paragraph words” dataset. At the end of the execution, CountB captures the number of verbs with letter count less than the average letter count of verbs. But the pseudocode may have mistakes in one or more lines. Identify all such lines (if any). It is a Multiple Select Question (MSQ).  Error in Line 4  Error in Line 8  Error in Line 11  Error at Line 12  Error in Line 17  Error at Line 18  Error in Line 21 The following pseudocode is executed using the “Words” table. What will be the value of A at the end of the execution?
Asked by amaladelsingh 28th October 2020, 10:24 PM
CBSE X Biology
I want a brief clarity on Taxonomy
Asked by reenacharan2008 28th October 2020, 9:11 PM

Chat with us on WhatsApp