Systems of Particles and Rotational Motion Test

Result

Systems of Particles and Rotational Motion Test - 64

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Question 1
4 / -1

Assertion The centre of mass of an isolated system has a constant velocity.
Reason If centre of mass of an isolated system is already at rest, it remains at rest.

A
If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

B
If both Assertion and Reason are true but Reason is not the correct explanation of the Assertion.

C
If Assertion is true but Reason is false.

D
If The Assertion and Reason both are false.

E
If Assertion is false but Reason is true.

Solution
Question 2
4 / -1

Assertion The centre of mass of a body may lie where there is no mass.
Reason Centre of mass of a body is a point, where two whole mass of the body is supposed to be concentrated.

A
If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

B
If both Assertion and Reason are true but Reason is not the correct explanation of the Assertion.

C
If Assertion is true but Reason is false.

D
If The Assertion and Reason both are false.

E
If Assertion is false but Reason is true.
Question 3
4 / -1

Assertion A particle is moving on a straight line with a uniform velocity, its angular momentum is always zero.
Reason The momentum is zero when particle moves with a uniform velocity.

A
If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

B
If both Assertion and Reason are true but Reason is not the correct explanation of the Assertion.

C
If Assertion is true but Reason is false.

D
If The Assertion and Reason both are false.

E
If Assertion is false but Reason is true.

Solution
Question 4
4 / -1

Assertion The centre of mass of a proton and an electron, released from their respective positions remains at rest.
Reason The centre of mass remain at rest, if no external force is applied.

A
If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

B
If both Assertion and Reason are true but Reason is not the correct explanation of the Assertion.

C
If Assertion is true but Reason is false.

D
If The Assertion and Reason both are false.

E
If Assertion is false but Reason is true.
Question 5
4 / -1

Assertion The position of centre of mass of a body does not depend upon shape and size of the body.
Reason Centre of mass of a body lies always at the centre of the body.

A
If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

B
If both Assertion and Reason are true but Reason is not the correct explanation of the Assertion.

C
If Assertion is true but Reason is false.

D
If The Assertion and Reason both are false.

E
If Assertion is false but Reason is true.
Question 6
4 / -1

Assertion A shell at rest, explodes. The centre of mass of fragments moves along a straight path.
Reason In explosion the linear momentum of the system remains always conserved.

A
If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

B
If both Assertion and Reason are true but Reason is not the correct explanation of the Assertion.

C
If Assertion is true but Reason is false.

D
If The Assertion and Reason both are false.

E
If Assertion is false but Reason is true.
Question 7
4 / -1

Assertion A judo fighter in order to throw his opponent on to the mattries he initially bend his opponent and then rotate him around his hip.
Reason As the mass of the opponent is brought doser to the fighter\'s hip, the force required to throw the opponent is reduced.

A
If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

B
If both Assertion and Reason are true but Reason is not the correct explanation of the Assertion.

C
If Assertion is true but Reason is false.

D
If The Assertion and Reason both are false.

E
If Assertion is false but Reason is true.
Question 8
4 / -1

Assertion The centre of mass of an electron and proton, when released moves faster towards proton.
Reason Proton is heavier than electron.

A
If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

B
If both Assertion and Reason are true but Reason is not the correct explanation of the Assertion.

C
If Assertion is true but Reason is false.

D
If The Assertion and Reason both are false.

E
If Assertion is false but Reason is true.
Question 9
4 / -1

Assertion At the centre of earth, a body has centre of mass, but no centre of gravity.
Reason Acceleration due to gravity is zero at the centre of earth.

A
If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

B
If both Assertion and Reason are true but Reason is not the correct explanation of the Assertion.

C
If Assertion is true but Reason is false.

D
If The Assertion and Reason both are false.

E
If Assertion is false but Reason is true.
Question 10
4 / -1

Assertion When a body dropped from a height explodes in mid air, its centre of mass keeps moving in vertically downward direction.
Reason Explosion occur under internal forces only. External force is zero.

A
If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

B
If both Assertion and Reason are true but Reason is not the correct explanation of the Assertion.

C
If Assertion is true but Reason is false.

D
If The Assertion and Reason both are false.

E
If Assertion is false but Reason is true.

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Re-Attempt Weekly Quiz Competition

Systems of Particles and Rotational Motion Test - 64

Result

Systems of Particles and Rotational Motion Test - 64

Score

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Rank

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SHARING IS CARING

Question 1

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but Reason is not the correct explanation of the Assertion.

If Assertion is true but Reason is false.

If The Assertion and Reason both are false.

If Assertion is false but Reason is true.

Solution

Question 2

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but Reason is not the correct explanation of the Assertion.

If Assertion is true but Reason is false.

If The Assertion and Reason both are false.

If Assertion is false but Reason is true.

Question 3

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but Reason is not the correct explanation of the Assertion.

If Assertion is true but Reason is false.

If The Assertion and Reason both are false.

If Assertion is false but Reason is true.

Solution

Question 4

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but Reason is not the correct explanation of the Assertion.

If Assertion is true but Reason is false.

If The Assertion and Reason both are false.

If Assertion is false but Reason is true.

Question 5

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but Reason is not the correct explanation of the Assertion.

If Assertion is true but Reason is false.

If The Assertion and Reason both are false.

If Assertion is false but Reason is true.

Question 6

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but Reason is not the correct explanation of the Assertion.

If Assertion is true but Reason is false.

If The Assertion and Reason both are false.

If Assertion is false but Reason is true.

Question 7

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but Reason is not the correct explanation of the Assertion.

If Assertion is true but Reason is false.

If The Assertion and Reason both are false.

If Assertion is false but Reason is true.

Question 8

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but Reason is not the correct explanation of the Assertion.

If Assertion is true but Reason is false.

If The Assertion and Reason both are false.

If Assertion is false but Reason is true.

Question 9

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but Reason is not the correct explanation of the Assertion.

If Assertion is true but Reason is false.

If The Assertion and Reason both are false.

If Assertion is false but Reason is true.

Question 10

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but Reason is not the correct explanation of the Assertion.

If Assertion is true but Reason is false.

If The Assertion and Reason both are false.

If Assertion is false but Reason is true.

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Question Analysis

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Score

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