Pressure & Force in a Beaker: Solutions

[Nellen2222]

Homework Statement

A 35 cm tall , 5 cm diamater cyldrical beaker is filled to its brim with water. whatis the donward force on the bottom of the beaker?

Homework Equations

p= po+ d*g*h
F= p*A
density of water is 1000

The Attempt at a Solution

p= 1.013*10^5 + 1000*9.8*0.35
p = 104,730 Pa

F= 104730 Pa * pi(0.025)^2 = 205.636 N

Answer sheet says 210 Newtons, and there are two sig digs in the question given. Either I did it wrong or I am supposed to round up. Let me know what is wrong please!

 

[Nellen2222]

Bump, anyone?

 

[Doc Al]

Answer sheet says 210 Newtons, and there are two sig digs in the question given. Either I did it wrong or I am supposed to round up. Let me know what is wrong please!

Looks OK to me. Round it up to two significant figures.

(And don't be bumping after just 30 minutes!)

 

[LawrenceC]

Bumping is against the forum rules.

It's due to roundoff. The net force on the bottom is onlly d*g*h.