Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
Yahoo!
Group Title
A 25000 Kg airplane takes off from rest and reaches 5000m altitude and cruises at 900km/h in 8 minutes .Find Avg Power ?
 2 years ago
 2 years ago
Yahoo! Group Title
A 25000 Kg airplane takes off from rest and reaches 5000m altitude and cruises at 900km/h in 8 minutes .Find Avg Power ?
 2 years ago
 2 years ago

This Question is Closed

Yahoo! Group TitleBest ResponseYou've already chosen the best response.0
My Work: Pavg = W/t W = Delta K.E W = 25000 * 250*250 / 2 t = 8 * 60
 2 years ago

Yahoo! Group TitleBest ResponseYou've already chosen the best response.0
i got Pavg = 1.6 MW but the answer shuld be 4.2 MW
 2 years ago

terenzreignz Group TitleBest ResponseYou've already chosen the best response.0
Hang on a bit...
 2 years ago

VincentLyon.Fr Group TitleBest ResponseYou've already chosen the best response.2
You have forgotten the gain in gravitational potential energy.
 2 years ago

Yahoo! Group TitleBest ResponseYou've already chosen the best response.0
We have Consider P.E here ?
 2 years ago

VincentLyon.Fr Group TitleBest ResponseYou've already chosen the best response.2
Of course! How could you raise the altitude of the plane without providing energy?!
 2 years ago

Yahoo! Group TitleBest ResponseYou've already chosen the best response.0
Yup...i got..it...thx..)
 2 years ago

Yahoo! Group TitleBest ResponseYou've already chosen the best response.0
but @VincentLyon.Fr we knw change in K.E is Work Done..Why cant we Use it here..)
 2 years ago

haridas_mandal Group TitleBest ResponseYou've already chosen the best response.0
Is it then mgh+delta K.E /t ?
 2 years ago

VincentLyon.Fr Group TitleBest ResponseYou've already chosen the best response.2
You can, but there are two works to take into account:  motive work by the engine (positive)  negative work by the weight so change in KE = Wengine  Mgh or W engine = change in KE + change in PE
 2 years ago

Yahoo! Group TitleBest ResponseYou've already chosen the best response.0
Ok...Thxx....
 2 years ago

VincentLyon.Fr Group TitleBest ResponseYou've already chosen the best response.2
yw :)
 2 years ago

VincentLyon.Fr Group TitleBest ResponseYou've already chosen the best response.2
I see you are now getting to the energy concept. Soon you will be able to solve problems of mechanics by this method.
 2 years ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.