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Important Previous years questions of IIT JEE part - 4 (In Hindi)
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Through this lesson, you can learn the solution of some advanced level questions which has asked in previous years exams of IIT JEE.

Kumar Ketan is teaching live on Unacademy Plus

Kumar Ketan
#Specialisation in Electronics #6 years teaching experience #Physics Faculty in Kota #"magical education" (211k+ subs) #Writer

U
Unacademy user
official language hindi
great....👌😍
Kumar Ketan
a year ago
Ty
Arti Bhaira
a year ago
most welcome 😍
  1. Home ExploreSearch Courses, Topics &Educators 0 minutes today Kumar Ketan Hey, this is kumar Ketan. I'm graduate in physics and doing further studies. I Edit Profile would love to teach you and give you all my knowledge. 415 Views in last 30 days 1,377 Lifetime Views 7 Courses 499 Followers Following Course Overview Expected topics of Current Affairs for SSC/1BPS/UPSC/PCS/UPPSC/ALL OTHER GOVERNMENT EXAMS with some details COLLISION A col ision as an isolated event in which two or more colliding bodies exert relatively strong forces on each other for a relatively short time CURRENT AFFAIRS Expected topics of General Awareness for UPSC CSE/SSc/ Railway with some details 4 Collision between particles have been divided broadly into two typer: 1. Elastk collision st VOTE enroll By Kumar Ketan By Kumar Ketan By Kumar Ketan (Hindi) Collision for IIT JEE (Hindi) Current Affairs 2018 for UPSC CSE (Hindi) General Awareness: Most Important 50 Question for. 23 Lessons 6 Lessons https://unacademy.com/user/KumarKetan


  2. .A disc of mass m is kept floating in air with the help of bullets fired with the same velocity at the rate of n bullets per second. Mass of each Bullet is "m/3" of the disc .lf the bullets rebound with the same speed in opposite direction after striking the disc, then the velocity of bullet at the time of impact is: (a)2g/3n. (b) 3g/2n (c) g/3n. (d) g/2n


  3. Solution: Change in momentum of bullet 3 2 3 Now force rate of change of momentum 2fwhere n is no of bullets) nmv This force must be equal to weight of disk for equilibrium Further, condition for equilibrium is:


  4. weight of disc Force 2 2 3 3


  5. For shown situation,if collision between block A and B is perfectly elastic,then find the maximum energy stored in spring in joules. 3kg -~2m/s 6kg smooth


  6. Solution: At maximum compression of spring, velocities of block EB and C are same (say v) then by conservation of linear momentum 3 x 2 - (3+6)v 6-6 m/s At this instant energy stored in a spring - ^ x 3x 2-1(3 +6) (2)


  7. 2 2


  8. Directions: This question contain statement 1 and statement 2 of the four choices given after the statement choose the one that best describes the two statements. Statement-1: A ball hits the wall and rebounds with same velocity, the momentum and kinetic energy of the system remain conserved. Statement-2: In elastic collision momentum and K.E, both are conserved 1. Statement-1 is true, statement-2 is false 2. Statement-1 is true , statement-2 is true; Statement-2 is the correct 3. 4. Statement-1 is false, statement-2 is true explanation of Statement-1 Statement-1 is true, statement-2 is true, Statement-2 is not the correct explanation of Statement-1