Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • Answer please! Water is flowing at a speed of 1.5 ms-1 through a horizontal tube of cross-sectional area 10-2 m2 and you are trying to stop the flow by your palm. Assuming that the water stops immediately after hitting the palm, the minimum force tha

 Water is flowing at a speed of 1.5 ms-1 through a horizontal tube of cross-sectional area 10-2 m2 and you are trying to stop the flow by your palm. Assuming that the water stops immediately after hitting the palm, the minimum force that you must exert should be (density of water=103 kgm-3).

 

  • Option 1)

    15 N

  • Option 2)

    22.5 N

  • Option 3)

    33.7

  • Option 4)

    45 N

 

Answers (1)

best_answer

As we have learned

Equation of Continuity -

Mass of the liquid entering per second at A = mass of the liquid leaving per second at B. 

a1 v1 = a2 v2 

- wherein

a1  and a2 be the area of cross section.

Let us say speed of water is v and area of cross section is A 

In one second mass of water that flows is m = \rho A v

F = momentum change per second 

mv = \rho A v ^2= 10 ^3 \times 10^{-2}\times (1.5 )^2= 22.5 N

 

 

 

 

 


Option 1)

15 N

Option 2)

22.5 N

Option 3)

33.7

Option 4)

45 N

Posted by

SudhirSol

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

Trending Articles/News

anam-khan

JEE Main 2024 session 2 result date announced; Steps to check NTA session 2 scores
anam-khan

JEE Main 2024 session 2 final answer key soon at jeemain.nta.ac.in; result on April 25
anam-khan

JEE Main 2024 Session 2: Last day to challenge answer key today

Latest Question