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Choose the correct options – (1) Frict...

Choose the correct options –
(1) Friction always opposes the motion
(2) Friction may opposes the motion
(3) If the applied force is increased the force of static friction remains constant.
(4) If the applied force is increased the force of static friction also increases upto limiting friction.

A

1, 2 and 3 are correct

B

1 and 2 are correct

C

2 and 4 are correct

D

1 and 3 are correct

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Knowledge Check

  • Work done by force of static friction .

    A
    can be positive
    B
    can be negative
    C
    can be zero
    D
    All of these

  • In the above question the force of limitting friction is

    A
    `3N`
    B
    `5N`
    C
    `4N`
    D
    `zero`

  • The maximum static frictional force is

    A
    Equal to twice the area of surface in contact
    B
    Independent of the area of surface in contact
    C
    Equal to the area of surface in contact
    D
    None of the above

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    Assertion : Friction always opposes the motion. Reason : Whenever one surface moves or tries to move over another surface, the force of friction starts acting on the surfaces.

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