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A body is acted upon by a number of exte...

A body is acted upon by a number of external forces . Can it remain at rest ?

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Yes , provided vector sum of all the external force acting on the body is zero .
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Knowledge Check

  • A body is acted upon by balanced forces

    A
    if it is rest only
    B
    if it is moving with constant speed
    C
    if even number of forces are acting on it
    D
    if it is not accelerating

  • If no external force acts on a system

    A
    (a) velocity of centre of mass remains constant
    B
    (b) position of centre of mass remains constant
    C
    (c) acceleration of centre of mass remains non-zero and constant
    D
    (d) All of the above

  • Which of the following statements are true? (i) An object will continue moving uniformly until the resultant force on it is zero. (ii) The bodies do not change their state of rest or motion unless acted upon by an unbalanced external force. (iii) If a body is at rest on the surface of the Earth, then the net downward Torce exer force exerted by the Earth and net upward force exerted on the body are not equal to each other.

    A
    Only (i) and (ii)
    B
    Only (ii) and (iii)
    C
    Only (i) and (iii)
    D
    All (i), (ii) and (iii)
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