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Work done by static friction on a body i...

Work done by static friction on a body in an inertial frame:
(A) must be +ve (B) must be -ve(c) must be zero (D) may be-ve

Answer

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Knowledge Check

  • Consider following statement (A) Work done by pseudo force in non-inertial frame itself cannot be positive (B) Net work done by static friction on the system (consisting surfaces I contact) is always zero (C) Net work done by Kinetic friction on the system (consisting surfaces in contact) may be positive (D) Work done by kinetic friction on a body may be positive Select correct alternative :-

    A
    A, B and C
    B
    B and D
    C
    A, B and D
    D
    A, B, C and D

  • 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.

    A
    Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-9
    B
    Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-9
    C
    Statement-1 is True, Statement-2 is False
    D
    Statement-1 is False, Statement-2 is True

  • If a chraged particle at rest experiences no electromagnetic force, (i) the electric field must be zero (ii) the magnetic field must be zero (iii) the electric field may or may not be zero (iv) the magnetic field may or may not be zero

    A
    (i), (ii)
    B
    (ii), (iv)
    C
    (ii), (iii)
    D
    (i), (iv)

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