9394949438

[LATEST]$type=sticky$show=home$rm=0$va=0$count=4$va=0




SYSTEM OF PARTICLES AND ROTATIONAL MOTION QUIZ - 30

Dear Readers,

JEE Advanced paper is considered to be one of the toughest entrance exams in India. Moreover, this Physics is considered the toughest subject because it is the most application-based. The student needs to get the basics right and then move on to mastering advanced concepts. System of Particles and Rotational motion consists of nearly about 6-7 % of marks in the Physics section.

Q1. Statement 1: The mass of a body cannot be considered to be concentrated at the centre of mass of the body for the purpose of computing its moment of inertia
       Statement 2: Then the moment of inertia of every body about an axis passing through its centre of mass would be zero
  •  Statement 1 is True, Statement 2 is True; Statement 2 is the correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is True; Statement 2 is not the correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is False
  •  Statement 1 is False, Statement 2 is True
Solution
(a)
Moment of inertia is the sum of m r2 terms. We cannot change all the r's, keep m's the same and expect Σmi ri2 to remain unchanged


Q2. Statement 1: The velocity of a body at the bottom of an inclined plane of given height is more when it slides down the plane compared to when it rolls down the same plane 
       Statement 2: In rolling down, a body acquires both, KE of translation and KE of rotation
  •  Statement 1 is True, Statement 2 is True; Statement 2 is the correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is True; Statement 2 is not the correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is False
  •  Statement 1 is False, Statement 2 is True
Solution
(b)
In sliding down, the entire PE is converted only into linear KE. In rolling down, a part of the same PE is converted into KE of rotation. Therefore, the velocity acquired is less. Both the statements are true, but statement-2 is not a correct explanation of the statement


Q3. Statement 1: Many great rivers flow towards the equator. The sediments that they increases the time of rotation of the earth about its own axis
       Statement 2: The angular momentum of the earth about its rotation axis is conserved
  •  Statement 1 is True, Statement 2 is True; Statement 2 is the correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is True; Statement 2 is not the correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is False
  •  Statement 1 is False, Statement 2 is True
Solution
(a)
Sediment deposited at the equator (away from the axis of rotation) increases the moment of inertia (not mass) of the Earth. Since Iω = constant, ω decreases and thus I = 2π/ω increases

Q4. 
  •  Statement 1 is True, Statement 2 is True; Statement 2 is the correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is True; Statement 2 is not the correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is False
  •  Statement 1 is False, Statement 2 is True
Solution
(a)
Position vector of centre of mass depends on masses of particles and their location. Therefore, change in shape/size of body do change the centre of mass


Q5. Statement 1: If a ball projected up obliquely from the ground breaks up into several fragments in its path, the centre of the system of all fragments moves in the same parabolic path compared to initial one till all fragments are in air
       Statement 2: In the situation of Statement 1, at the instant of breaking, the fragments may be thrown in different directions with different speeds
  •  Statement 1 is True, Statement 2 is True; Statement 2 is the correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is True; Statement 2 is not the correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is False
  •  Statement 1 is False, Statement 2 is True
Solution
(b)
The center of mass of the fragments will continue its parabolic path. After the breakage, fragments may move in different directions. Both statements are correct, but Statement II is not the explanation of Statement I


Q6. Statement 1: Moment of inertia of a particle is same, whatever be the axis of rotation
       Statement 2: Moment of inertia depends on mass and distance of the particles
  •  Statement 1 is True, Statement 2 is True; Statement 2 is the correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is True; Statement 2 is not the correct explanation for Statement 1
  • Statement 1 is True, Statement 2 is False
  •  Statement 1 is False, Statement 2 is True
Solution
(a)
The moment of inertia of a particle about an axis of rotation is given by the product of the mass of the particle and the square of the perpendicular distance of the particle from the axis of rotation. For different axis, distance would be different, therefore moment of inertia of a particle changes with the change in axis of rotation


Q7. Statement 1: A body cannot have energy without having momentum but it can have momentum without having energy 
       Statement 2: Momentum and energy have different dimensions
  •  Statement 1 is True, Statement 2 is True; Statement 2 is the correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is True; Statement 2 is not the correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is False
  •  Statement 1 is False, Statement 2 is True
Solution


Q8. Statement 1: In a two–body collision, the momenta of the particles are equal and opposite to one another, before as well as after the collision when measured in the centre of mass frame
       Statement 2: The momentum of the system is zero from the centre of mass frame
  •  Statement 1 is True, Statement 2 is True; Statement 2 is the correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is True; Statement 2 is not the correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is False
  •  Statement 1 is False, Statement 2 is True
Solution


Q9. Statement 1: A ladder is more likely to slip when a person is near the top than when he is near the bottom 
       Statement 2: The friction between the ladder and the floor decreases as he climbs up
  •  Statement 1 is True, Statement 2 is True; Statement 2 is the correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is True; Statement 2 is not the correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is False
  •  Statement 1 is False, Statement 2 is True
Solution
(c)
As the person climbs up, normal reaction and friction between the ladder and the wall both increases. This decreases normal reaction from the floor, decreasing limiting value of friction there. This increases the possibility of the ladder to ship


Q10. Statement 1: A shell at rest, explodes. The centre of mass of fragments moves along a straight path 
         Statement 2: In explosion the linear momentum of the system remains always conserved
  •  Statement 1 is True, Statement 2 is True; Statement 2 is the correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is True; Statement 2 is not the correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is False
  •  Statement 1 is False, Statement 2 is True
Solution
(a)
As the shell is initially at rest and after explosion, according to law of conservation of linear momentum, the center of mass remains at rest. While parts of shell move in all direction, such that total momentum of all parts is equal to zero

author image

Written by: AUTHORNAME

AUTHORDESCRIPTION

Want to know more

Please fill in the details below:

INNER POST ADS

Latest IITJEE Articles$type=three$c=3$author=hide$comment=hide$rm=hide$date=hide$snippet=hide

Latest NEET Articles$type=three$c=3$author=hide$comment=hide$rm=hide$date=hide$snippet=hide

Name

Admissions,1,Alternating Current,60,AP EAMCET 2020,1,Basic Maths,2,BCECE 2020,1,best books for iit jee,2,best coaching institute for iit,1,best coaching institute for iit jee preparation,1,best iit jee coaching delhi,1,best iit jee coaching in delhi,2,best study material for iit jee,4,BITSAT Registration 2020,1,Blog,62,books for jee preparation,1,books recommended by iit toppers,3,Capacitance,3,CBSE,1,CBSE accounts exam,1,CBSE boards,1,CBSE NEET,9,cbse neet 2019,3,CBSE NEET 2020,1,cbse neet nic,1,Centre of Mass,2,Chemistry,58,Class 12 Physics,15,coaching for jee advanced,1,coaching institute for iit jee,2,Collision,2,COMEDK UGET 2020 Application Form,1,COMEDK UGET 2020 Exam Form,1,COMEDK UGET news,1,CUCET 2020,2,Current Electricity,4,CVR college,1,Digestion and Absorption Notes PDF,1,Electromagnetic Induction,3,Electronics,1,Electrostatics,3,Energy,1,Engineering & Medical,1,Fluid Mechanics,4,Gravitation,2,GUJCET 2020 Application Form,1,Heat,4,iit admission,1,iit advanced,1,iit coaching centre,3,iit coaching centre in delhi,2,iit coaching classes,2,iit coaching in delhi,1,iit coaching institute in delhi,1,iit entrance exam,1,iit entrance exam syllabus,2,iit exam pattern,2,iit jee,5,iit jee 2019,3,iit jee advanced,2,iit jee books,3,iit jee coaching,2,iit jee exam,3,iit jee exam 2019,1,iit jee exam pattern,3,iit jee institute,1,iit jee main 2019,2,iit jee mains,3,iit jee mains syllabus,2,iit jee material,1,iit jee online test,3,iit jee practice test,3,iit jee preparation,6,iit jee preparation in delhi,2,iit jee preparation time,1,iit jee preparation tips by toppers,2,iit jee question paper,1,iit jee study material,3,iit jee study materials,2,iit jee syllabus,2,iit jee syllabus 2019,2,iit jee test,3,iit preparation,2,iit preparation books,5,iit preparation time table,2,iit preparation tips,2,iit syllabus,2,iit test series,3,IITJEE,100,Important Biology Notes for NEET Preparation,1,IPU CET,1,JEE Advanced,83,jee advanced exam,2,jee advanced exam pattern,1,jee advanced paper,1,JEE Books,1,JEE Coaching Delhi,3,jee exam,3,jee exam 2019,6,JEE Exam Pattern,2,jee exam pattern 2019,1,jee exam preparation,1,JEE Main,85,jee main 2019,4,JEE Main 2020,1,JEE Main 2020 Application Form,2,JEE Main 2020 news,2,JEE Main 2020 Official Answer Key,1,JEE Main 2020 Registration,1,JEE Main 2020 Score,1,JEE Main application form,1,jee main coaching,1,JEE Main eligibility criteria,3,jee main exam,1,jee main exam 2019,3,jee main online question paper,1,jee main online test,3,JEE Main Paper-2 Result,1,jee main registration,2,jee main syllabus,2,JEE mains 2020,1,jee mains question bank,1,jee mains test papers,3,JEE Mock Test,2,jee notes,1,jee past papers,1,JEE Preparation,2,jee preparation in delhi,1,jee preparation material,4,JEE Study Material,1,jee syllabus,6,JEE Syllabus Chemistry,1,JEE Syllabus Maths,1,JEE Syllabus Physics,1,jee test series,3,KCET - 2020,1,Kinematics,1,Latest article,5,Latest Articles,61,Latest News,34,latest news about neet exam,1,Laws of Motion,2,Magnetic Effect of Current,3,Magnetism,3,MHT CET 2020,2,MHT CET 2020 exam schedule,1,Modern Physics,1,NCERT Solutions,15,neet,3,neet 2019,1,neet 2019 eligibility criteria,1,neet 2019 exam date,2,neet 2019 test series,2,NEET 2020,2,NEET 2020 Application Form,1,NEET 2020 Eligibility Criteria,1,NEET 2020 Registration,1,neet application form,1,neet application form 2019 last date,1,Neet Biology Syllabus,1,Neet Books,3,neet eligibility criteria,3,neet exam 2019,7,neet exam application,1,neet exam date,1,neet exam details,1,neet exam pattern,6,neet exam pattern 2019,2,neet examination,1,neet mock test 2019,1,Neet Notes,3,Neet Online Application Form,3,neet online test,2,neet past papers,1,neet physics syllabus,1,neet practice test,2,NEET preparation books,1,neet qualification marks,1,NEET question paper 2019,1,neet question papers,1,neet registration,1,Neet Study Material,3,neet syllabus,6,neet syllabus 2019,5,NEET Syllabus 2020,1,neet syllabus chemistry,1,neet syllabus for biology,1,neet syllabus for physics,1,neet test series,1,neet ug 2019,2,news,5,online study material for iit jee,1,Optical Instruments,1,Physics,110,physics books for iit jee,1,Power,1,Practical Physics,1,Quiz,5,Ray Optics,1,Rotational Motion,3,SHM,3,Simple Harmonic Motion,3,study materials for iit jee,1,Study Notes,110,study notes for iit jee,1,Thermodynamics,4,TS EAMCET Notification,2,Units and Dimensions,1,UPSEE 2020,1,UPSEE 2020 Application Form,2,UPSEE EXAM,1,Vectors,2,VITEE Application form,1,Wave Motion,3,Wave Optics,1,WBJEE 2020 Admit Card,1,WBJEE 2020 Answer Key,1,Work,1,
ltr
item
BEST NEET COACHING CENTER | BEST IIT JEE COACHING INSTITUTE | BEST NEET & IIT JEE COACHING: System of Particles and Rotational Motion-Quiz-30
System of Particles and Rotational Motion-Quiz-30
https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhfXdhe9bvzGpvr-pw5xCERP74NzjDCCMGB7gncg94LJccWZCpA3dkB2TeUGv6d5Bf3-n66gGmynwOxW0DR7fKooByE1eTjdTjFoIZkVtKNwkyYtvqpPvOCdqLpSd2RUhuV3dwtPnTLrypS/w652-h368/top+image+%252825%2529.jpg
https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhfXdhe9bvzGpvr-pw5xCERP74NzjDCCMGB7gncg94LJccWZCpA3dkB2TeUGv6d5Bf3-n66gGmynwOxW0DR7fKooByE1eTjdTjFoIZkVtKNwkyYtvqpPvOCdqLpSd2RUhuV3dwtPnTLrypS/s72-w652-c-h368/top+image+%252825%2529.jpg
BEST NEET COACHING CENTER | BEST IIT JEE COACHING INSTITUTE | BEST NEET & IIT JEE COACHING
https://www.cleariitmedical.com/2021/07/system-of-particles-and-rotational_18.html
https://www.cleariitmedical.com/
https://www.cleariitmedical.com/
https://www.cleariitmedical.com/2021/07/system-of-particles-and-rotational_18.html
true
7783647550433378923
UTF-8
Loaded All Posts Not found any posts VIEW ALL Readmore Reply Cancel reply Delete By Home PAGES POSTS View All RECOMMENDED FOR YOU LABEL ARCHIVE SEARCH ALL POSTS Not found any post match with your request Back Home Sunday Monday Tuesday Wednesday Thursday Friday Saturday Sun Mon Tue Wed Thu Fri Sat January February March April May June July August September October November December Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec just now 1 minute ago $$1$$ minutes ago 1 hour ago $$1$$ hours ago Yesterday $$1$$ days ago $$1$$ weeks ago more than 5 weeks ago Followers Follow THIS CONTENT IS PREMIUM Please share to unlock Copy All Code Select All Code All codes were copied to your clipboard Can not copy the codes / texts, please press [CTRL]+[C] (or CMD+C with Mac) to copy

STAY CONNECTED