Hey there! We receieved your request
Stay Tuned as we are going to contact you within 1 Hour
One of our academic counsellors will contact you within 1 working day.
Click to Chat
1800-5470-145
+91 7353221155
Use Coupon: CART20 and get 20% off on all online Study Material
Complete Your Registration (Step 2 of 2 )
Sit and relax as our customer representative will contact you within 1 business day
OTP to be sent to Change
Dear jee king
here wall is fixed so mass of the wall is assume as infinite
so moment conservation will not give any important result.
so we use velocity of approach=velocity of seperatiom
you can say that momentum of wall is 2mv
mv +0*∞ =-mv' +v1*∞
this equation does not give any result
Please feel free to post as many doubts on our discussion forum as you can. If you find any question Difficult to understand - post it here and we will get you the answer and detailed solution very quickly. We are all IITians and here to help you in your IIT JEE & AIEEE preparation. All the best. Regards, Askiitians Experts Badiuddin
2) Momentum is conserved only when there is no external force.But in this case external force is there on the wall.That external force is from the ground.
2) here, the system of consideration is the wall.
check, whether there is any external force acting on the system.
certainly, there is some external force(along the normal to the wall) on the wall exerted by the ball.
so, conservation of linear momentum is not applicable to the wall.
If we consider (the wall+the ball) as the system, then there is no external force in horizontal direction.
(assuming, the wall is vertical and the ball is moving horizontally).
so, we can apply conservation of linear momentum.
let 'm' be the mass of the ball and 'M' be the mass of the wall. if we take the wall is rigidly fixed.
then ,
(m)x(v) + (M)x(0) = (m)x(v') + (M)x(0).
=> v = v'.
=> elastic collision.
Most important point regarding conservation of linear momentum is, THE SYSTEM which we consider.
if there is no external force in a particular direction, then apply conservation of linear momentum in that direction.
if some external force acts, then apply IMPULSE EQUATIONS.
________________________________________________________________________________
If u 've any querries plzz feel free to post them.
Regards,
Nagaraju Kandru(MSc)
IIT-Guwahati
Get your questions answered by the expert for free
You will get reply from our expert in sometime.
We will notify you when Our expert answers your question. To View your Question
Win Gift vouchers upto Rs 500/-
Register Yourself for a FREE Demo Class by Top IITians & Medical Experts Today !