Sign up now
to enroll in courses, follow best educators, interact with the community and track your progress.
Enroll
386
Download
Important Previous years questions of IIT JEE part - 5 (In Hindi)
171 plays

More
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
thanku mam yes mam Himani is right, this time question based on Trade Union of UK and USA was asked in DEC2018 exam
Sg
is any shortcut trick to solve the question first?
sir Mai class 12 Mai hu Abi kya Mai 1 mahine Mai Jee ki preparation kar sakta hu
Kumar Ketan
8 months ago
I don't think so. Give your time to your study properly. And then you'll be ready for JEE
thank you sir 😍
Kumar Ketan
9 months ago
E
Kumar Ketan
9 months ago
Welcm beta
Arti Bhaira
9 months ago
😍
  1. 0 minutes today Home ExploresSearch Courses, Topics&Educators Kumar Ketan Edit Profile Hey, this is kumar Ketan. I'm graduate in physics and doing further studies. I would love to teach you and give you all my knowledge. 415 Views in last 30 days 1,377 Lifetime Views 7 Courses499 Follwers Following Expected topics of Current Affairs for SSC/IBPS/UPSC/PCS/UPPSC/ALL OTHER GOVERNMENT EXAMS with some details COLLISION Course Overview 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 5 Collision between particles have been divided broadly into two typer: 1. Elastk collision 1st 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. https://unacademy.com/user/KumarKetan


  2. A ball collides elastically with another ball of the same mass. The collision is oblique and initially one of the ball was at rest. After the collision the two balls move with same speeds. What will be the angle between the velocity of the ball after the collision? (a) 30 (b) 45 (c) 60 (d) 90


  3. vsin 01 U cos 2 M M02 coS O01 v sin 2


  4. Before collision- let velocity of first ball is velocity of second ball is u2 According to question, u2 -0 After collision, velocity of both ball is v


  5. From conservative of linear momentum where, u =0 01- And Therefore, say,which gives


  6. From equation (1) COS COS 72 u-2v cos 0 from conservation of energy 2 2 2 here ui- u


  7. 2 2 0 2 therefore 2v 2v 2 2 cos 45


  8. which gives = Vi= ,-45 and 1 + 2 = 90


  9. Statement-1: The centre of mass and centre of gravity of a body are two different positions in general. Statement-2: The centre of mass and centre of gravity of a body coincide if gravitational field is uniformm (a)Statement-1 is True, Statement-2 is True; Statement-2 is correct explanation for Statement-1 (b) Statement-1 is True,Statement-2 is True; Statement-2 is not a correct explanation for Statement-1 (c) Statement-1 is true, Statement-2 is False. (d)Statement-1 is False, Statement-2 is True.