sign up I login
 advanced
refer a friend - earn nickels!!

Ask & Discuss Questions with Community & Experts

 Moderation Team
 90 chars left    advanced
Ask iit jee aieee pet cbse icse state board community Community Discussion Question: Kinetic Energy
Forum Index -> Mechanics like the article? email it to a friend.  
Author Message
[Post New]30 Nov 2007 13:52:19 IST
    Subject: Kinetic Energy
[Up] View Post
tinchubenz (5)

Cool goIITian

Olaaa!! Perrrfect answer. 1  [1 rates]
tinchubenz's Avatar
total posts: 32    
offline Offline
When the K.E. of a body is increased by 300%, the momentum of the body is increased by:
a.20%
b.50%
c.100%
d.200%
    
[Post New]30 Nov 2007 14:05:38 IST
    Subject: Kinetic Energy
[Up] View Post
harsha_27 (1343)

Blazing goIITian

Olaaa!! Perrrfect answer. 225  [334 rates]
harsha_27's Avatar
total posts: 840    
offline Offline
200% because momentum (MV)=sqr.rt.[2m(k.e.)]...




"Nenenthedhavano naake teleedu"

 this reply: 0 points  (with 0 Olaaa!! Perrrfect answer.   in 0 votes )   [?]
 
You have to be logged on to rate
  
[Post New]30 Nov 2007 14:46:15 IST
    Subject: Kinetic Energy
[Up] View Post
rooney (894)

Blazing goIITian

Olaaa!! Perrrfect answer. 152  bad job dude!! I dont approve of this answer! 1  [221 rates]
rooney's Avatar
total posts: 577    
offline Offline
Nope. Its 100%.

Velocity is doubled. So, momentum is doubled. So, increase is of 100%.
http://14-69-8.blogspot.com
My blog
 this reply: 0 points  (with 0 Olaaa!! Perrrfect answer.   in 0 votes )   [?]
 
You have to be logged on to rate
  
[Post New]30 Nov 2007 16:00:17 IST
    Subject: Kinetic Energy
[Up] View Post
spideyunlimited (3493)

Moderator

Olaaa!! Perrrfect answer. 583  [872 rates]
spideyunlimited's Avatar
total posts: 2831    
offline Offline
KE = 1/2 m v^2

KE is increased by 300% means that new KE = 4 x original KE
[ original KE + (300 / 100) * original KE ]

so new KE = 4 * 1/2 * m * v^2
= 1/2 * m * (2v)^2
so velocity has doubled.

so if original momentum was mv
new momentum is m(2v)
= twice of original momentum
means momentum has increased by 100% [ mv + (100/100)mv ]
---------------------------------------------------------------
* Gaurav Ragtah ( aka Artemis Fowl )

* Agent 'G' [sniper] - SD-6 (Alliance of Twelve)

* Your friendly neighborhood spideyunlimited
 this reply: 0 points  (with 0 Olaaa!! Perrrfect answer.   in 0 votes )   [?]
 
You have to be logged on to rate
  
[Post New]30 Nov 2007 22:15:55 IST
    Subject: Re:Kinetic Energy
[Up] View Post
karthik2007 (3375)

Blazing goIITian

Olaaa!! Perrrfect answer. 593  [798 rates]
karthik2007's Avatar
total posts: 2615    
offline Offline
The basis for such problems is simply this:

Kinetic Energy = (Momentum)2/2 x mass
Will nip in at times to solve problems :)
 this reply: 5 points  (with 1 Olaaa!! Perrrfect answer.   in 1 votes )   [?]
 
You have to be logged on to rate
  
 
Forum Index -> Mechanics
Go to:   

Top Offers for goIITians
Correspondence Courses
Brilliant Tutorials
Narayana Institute
Aakash Institute
Classroom/Crash Courses
Narayana - Kota , Delhi , Others
Brilliant Tutorials - Class , Crash
Aakash Institute - Medical , Engg
Online Test Series
Brilliant Tutorials
Narayana Institute
Aakash Institute
Mahesh Tutorials
AMITY      Sri Chaitanya