fl #4 c/p #58

mshah
Posts: 18
Joined: Mon Aug 28, 2017 4:21 pm

fl #4 c/p #58

Postby mshah » Mon Oct 16, 2017 9:29 pm

Why is y2=5m not 20?
NS_Tutor_Andrew
Site Admin
Posts: 514
Joined: Mon May 23, 2016 1:47 pm

Re: fl #4 c/p #58

Postby NS_Tutor_Andrew » Tue Oct 17, 2017 10:35 am

Hi mshah,

Excellent question! That's because we defined y=0 as being the surface of the water. We could have defined the ground as y=0, the hole as y=20, and the surface of the water as y=25 - the math would be the same, just a little bit more involved to actually carry out. The key here is to define the y coordinates in a system in the way that makes your life easiest :).

Hope this helps, & keep up the great questions!
Andrew D.
Content Manager, Next Step Test Prep.
mshah
Posts: 18
Joined: Mon Aug 28, 2017 4:21 pm

Re: fl #4 c/p #58

Postby mshah » Tue Oct 17, 2017 1:14 pm

WOuldn't you get a higher velocity if u used 20 as the height of the hole?

Return to “Post Questions About Exams and QBank”