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STATEMENT-1: It is easier to pull a heav...

STATEMENT-1: It is easier to pull a heavy object than to push it on a level ground and
STATEMENT-2: The magnitude fo frictional force depends on the nature of the two surfaces in contact.

A

If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.

B

If both Assertion & Reason are True but Reason is not a correct explanation of the Assertiion.

C

If Assertion is True but the Reason is False.

D

If both Assertion & Reason are False

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The correct Answer is:
B
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STATEMENT-1: It is easier to pull a heavy object than to push it on a level ground and STATEMENT-2: The magnitude of frictional force depends on the nature of the two surfaces in contact.

Give a example to show that friction depends on the nature of two surface in contact.

STATEMENT -1 : In a tug of war game, the two teams always pull the masless rope with same magnitude of force . and STATEMENT -2 : The force exerted by any team on the rope is equal to tension developed in the rope which will be same at both the ends .

STATEMENT-1: During a turn, the value of centripetal force should be less than the limiting frictional force. STATEMENT-2: The centripetal force is provided by the frictional force between the tyre and the road.

STATEMENT-1: A block is pulled along a horizontal frictionless surface by a thick rope. The tension in the rope will not always be the same at all points on it. because STATEMENT-2: the tension in the rope depends on the acceleration of the block rope system and the mass of the rope.

STATEMENT -1 : In absence of air friction, it is claimed that all object fall with the same acceleration although, a heavier object is pulled towards the earth with more force than a lighter object. because STATEMENT-2 : Net external force is always equal to rate of change of linear momentum.

STATEMENT - 1 : If an object is at rest then there should not be any friction on it . STATEMENT - 2: If an object is moving then the friction acting on it has to be kinetic . STATEMENT -3 : If an object is at rest then kinetic friction cannot act on it.

STATEMENT - 1 : The value of modulus of elasticity depends on the magnitude of the stress and strain and STATEMENT - 2 : A given material have different moduli of elasticity depending on the type of stress applied.

ALLEN-TEST PAPER-Exercise (Physics)
  1. Assertion :- Work done by frictional force may be sometimes path indep...

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  2. Assertion :- Work done is positive when force acts in the direction of...

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  3. STATEMENT-1: It is easier to pull a heavy object than to push it on a ...

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  4. Assertion :- When a man climbs the rope friction force acts in downwar...

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  5. Assertion :- According work energy theorem net work done on a body is ...

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  6. Assertion :- Mass and energy are not conserved separately,but are cons...

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  7. Assertion :- When a spring is elongated work done by spring is negativ...

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  8. A particle is moving on a circular path such that at any instant its p...

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  9. A car is moving along a circular track with tangential acceleration of...

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  10. A point mass moves along a circle of radius R with a constant angular ...

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  11. A car is moving on circular path of radius 100m such that its speed is...

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  12. A bob of mass m is attached at one end of a string of length l other e...

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  13. A ball of mass m inside a smooth spherical shell of radius R with velo...

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  14. A bead is arranged to move with constant speed around a loop that lies...

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  15. A particle is suspended from a string of length R. It is given a veloc...

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  16. The angular displacement(theta) of the blades of a ceiling fan, when t...

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  17. A wheel of radius R=0.1m is rolling without slipping on a horizontal s...

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  18. Two identical rings each of mass m with their planes mutually perpendi...

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  19. The moment of inertia of a uniform flat disc about its own axis is I. ...

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  20. The diagram shows a uniform disc of mass M & radius 'a', if the moment...

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