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STATEEMNT-1 : Work done by frictional fo...

STATEEMNT-1 `:` Work done by frictional force is always either negative or zero.
because
STATEMENT-2 `:` Work done by the static friction on a system may be zero.

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The correct Answer is:
D
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Knowledge Check

  • Work done by a frictional force is

    A
    negative
    B
    positive
    C
    zero
    D
    all of the above

  • Work done by force of static friction .

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

  • Work done by the force of friction

    A
    can be zero
    B
    can be positive
    C
    can be negative
    D
    any of the above

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    the work done by friction in 10 s is

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    STATEMENT-1 Work done by static friction in any reference frame is zero STATEMENT-2 If work done on the body is positive its kinetic energy increases.

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