Pressure problem but without any given values. How?

  • Thread starter evilrain14
  • Start date
  • #1

Homework Statement


Both dams equally wide and equally high. The first dam holds back a very large lake, and the second dam holds back a narrow river.


Homework Equations


Which dam has to be built more strongly?
a.) the first dam
b.) the second dam
c.) both


The Attempt at a Solution



i know it would be the second dam that holds back a narrow river, but how can i prove it mathematically/algebraically?
how can i show the answer in ratio? -.-

i need your help please.

thanks!
 

Answers and Replies

  • #2
93
3
Do you know what the hydrostatic pressure is?
 
  • #3
yes. but my problem is, there is no any given values/numbers. i know what to answer but i can't prove it.. :(
 
  • #4
93
3

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