How To Find The Drag and Lift Force?

mymachine

How can I find the drag and lift force such as below illustration?

http://s4.postimage.org/sxmnflttp/dragillustration.png

Below is my calculation:

http://s4.postimage.org/ao75d6r0d/dragcalculation.png

jedishrfu

I dont understand how is drag and lift related to a sliding block?

mymachine

It's not a sliding block.

It's moving on the air.

berkeman

Which block? There are two in the illustration. And which way is it moving? Where does this problem come from?

Travis_King

Perhaps the illustration is showing that the block has a rectangular cross-section? Then, perhaps the block is moving to the right, in which case the 2000 N is the drag force?

I have never ever seen an FBD like this for fluid/aero dynamics...

mymachine

Two?

Wrong.

As you can see from the first image, the "A" is the area of the surface which its depth is 10 m.

The motion is from right to left.

The snout is at the front and the flat is at the back.

jedishrfu

Be nice, we're trying to help and you didn't provide enough information to begin with.

mymachine

Am I that really not so nice?

I just telling that was wrong.

No other purpose.

jedishrfu

Okay, but its considered harsh to say it that way.

Instead most people would say: No, there's only one box.