Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 9 Answered

if we increase kinetic energy by 20%, then find percentage increase in linear momentum
Asked by kaziryan.05 | 19 May, 2021, 07:43: AM
answered-by-expert Expert Answer
If v is speed of particle and m is mass of particle , then Kinetic energy K is given as
 
K = (1/2) m v2
 
Momentum p = ( m v ) 
 
If we eliminate v and write kinetic energy in terms of momentum , we get
 
K = p2 / ( 2 m )
 
If we take logarithm on both side and differentiate , we get
 
ln(K) = ln(1/2m) +  2 ln(p)
 
dK/K  = 2 ( dp/p )
 
Hence if change in kinetic energy is 20%  ,  dK/K = 0.2 .
 
Hence change in momentum ( dp/p ) = 0.1  or change in momentum 10%
Answered by Thiyagarajan K | 19 May, 2021, 09:11: AM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test Subjective Questions Webinar Subjective Questions Pre Board Assessment
Answered Unanswered My Questions My Answers
CBSE 9 - Physics
define kinetic energy
Asked by topperlearningforcontent | 31 Jan, 2022, 10:14: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
An elevator is designed to lift a load of 1000 kg with uniform velocity of 2m/s . Power of the elevator will be?
Asked by tajbindarkaurs | 14 Nov, 2021, 10:19: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
if we increase kinetic energy by 20%, then find percentage increase in linear momentum
Asked by kaziryan.05 | 19 May, 2021, 07:43: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
a bus of mass 10000kg with a velocity of 90 km/h. calculate work done to stop the bus
Asked by parthmalikschool | 24 Nov, 2020, 12:45: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
define kinetic energy
Asked by swatipuspapatel | 31 May, 2020, 12:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
what is kinetic energy
Asked by matoriark | 29 Mar, 2020, 02:21: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
Hi, my name is Aprameya i had a doubt we know K.E.(Kinetic Energy) = (1/2)mv^2 the v over here is velocity but at what time. Velocity will be different at differnt points of time i mean at 1second it might be something and and at another second it might be something else. so while calculating which velocity do we use
Asked by aprameyachaubeycr7 | 23 Mar, 2020, 02:01: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
what is energy
Asked by ujjwalsharma7667 | 28 Dec, 2019, 08:35: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
A ball of mass 0.25kg is thrown upwards with a velocity of 10m/s at what height it's kinetic energy become 10J
Asked by hy0831422 | 21 Dec, 2019, 11:37: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
The water stored in dam can be used to generate electricity.give reason
Asked by shubhadanaik91 | 14 Nov, 2019, 09:02: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt

Be a Top Scorer in the Exam with Test Series and Test Generator!

Enrol Now
×