We can also calculate E by using formula f- pgh directly:

I×hit TI

i→ !i¥¥¥÷÷÷÷.-

-- -- -

L

d.F'

= dix E + digsdfx =

- pgh -b -Cds use ) dis -- - eghb . @ s Sino )nay Tx

= -pghb - dy = - eghb . dx

Total Force applied on the surface : II'

= R,i t Ry j

Rx -- f dex = f - pgh b . dy ← h -- htt'T

= J÷eg( hit H -D)bdy = -fegb . htt tpsb HI )- -

Ry= fdfy = J - pgh.to . dx

E Fs

= E-fglh ,+ H - fix,) bdx ← h = hit H - fun

=- Eg h .

.Lt pg b - J! (H- fix) dx )IT ater

mg