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If net force on a system of particles is...

If net force on a system of particles is zero, then match the following columns
`{:("Column1","Column2"),("A Acceleration of center of mass","P Constant"),("B Momentum of center of mass","Q Zero"),("C Velocity of center of mass","R May be zero"),("Velocity of an individual particle of the system","S May be constant"):}`

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The correct Answer is:
(A) `rarr` q; (B) `rarr` p,r; (C ) `rarr` p,r; (D) `rarr` r,s
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If net force on a system of particles is zero. Then {:(,"Column I",,"Column II",),((A),"Acceleration of centre of mass",(p),"Constant",),((B),"Velocity of centre of mass",(q),"Zero",),((C ),"Momentum of centre of mass",(r ),"May be zero",),((D),"Velocity of an individual particle of the system",(s),"May be constant",):}

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Four point masses are placede at four corners of a square of side 4m as shown. Match the following columns. {:("Column1","Column2"),("A x-coordinate of center of mass of 4kg and 2kg","P (7//2)m"),("B x-coordinates of center of mass of 4kg 2kg and 3kg","Q (4//3)m"),("C y-coordinate of center of mass of 1kg 4kg and 3kg","R 3m"),("y-coordinate of center of mass of 1kg and 3kg","(20/9)m"):}

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Match the following columns. {:("Column I","Column II"),("(A) Force of friction","(p) Oppose motion"),("(B) Normal reaction on a block kept on horizontal ground","(q) Oppose relative motion"),(,"(r) Is always mg"),(,"(s) May be equal to mg"),(,"(t) None"):}

Assertion: If net force on a system is zero, then momentum of every individual body remains constant. Reason: If momentum of a system is constant, then kinetic energy of the system may change.

Match the following columns, {:("Column1","Column2"),("a Thermal resitance","p [MT^(-3)K^(-4)]"),("b Stefan's constant","q [M^(-1)L^(-2)T^(3)K]"),("c Wien's constant","r [ML^(2)T^(-3)]"),("d Heat current","s [LK]"):}

In the diagram shown in figure mass of both the balls in same. Match the following columns. {:("Column1","Column2"),("A For" v^(')=v,"P e=0"),("B For" v^(')=v//2,"Q e=1"),("C For" v^(')= 3//4v,"R e=1/2"),("-","(S data is insufficient"):}

ALLEN-CENTRE OF MASS-EXERCISE-III
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  2. Ratio of amplitude for two wave is 11:4 .Find the ratio of maximum amp...

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  3. If net force on a system of particles is zero, then match the followin...

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  4. {:(,"Column I",,"Column II",),((A),"Elastic collision",(p),KE " is con...

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  5. Assertion: In case of bullet fired from gun, the ratio of kinetic ener...

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  6. Statement -1 : When a girl jumbs from a boat, the boat slightly moves ...

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  7. Statement I: In a two-body collision, the momenta of the particles are...

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  8. Statement-1 : The centre of mass and centre of gravity of a body are t...

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  9. Statement-1 : A particle of mass m strikes a smooth wedge of mass M as...

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  10. Statement-1 : The coefficient of restitution is less than one for all ...

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  11. Statement I: No external force acts on a system of two spheres which u...

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  12. Statement I: If a sphere of mass mmoving with speed u undergoes a perf...

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  13. Statement I: If a ball projected up obliquely from the ground breaks u...

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  14. A small block of mass m=1 kg is placed over a wedge of mass M=4 kg as ...

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  15. A small block of mass m=1 kg is placed over a wedge of mass M=4 kg as ...

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  16. Ratio of amplitude for two wave is 11:4.Find the ratio of intensity?

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  17. A small block of mass m=1 kg is placed over a wedge of mass M=4 kg as ...

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  18. Two bodies collide as shown in figure. During collision they exert imp...

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  19. Two bodies collide as shown in figure. During collision they exert imp...

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  20. Choose the correct answer: A ball collides at B with velocity 10m//s ...

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