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Mechanical Engineering :: Engineering Mechanics

  1. Work done is said to be zero, when

  2. A.

    some force acts on a body, but displacement is zero

    B.

    no force acts on a body but some displacement takes place

    C.

    either (a) or (b)

    D.

    none of the above


  3. The force which acts along the radius of a circle and directed away from the centre of the circle is called centrifugal force.

  4. A.

    Agree

    B.

    Disagree


  5. One watt is equal to

  6. A.

    0.1 joule/s

    B.

    1 joule/s

    C.

    10 joules/s

    D.

    100 joules/s


  7. two like parallel forces are acting at a distance of 24 mm apart and their resultant is 20 N. It the line of action of the resultant is 6 mm from any given force, the two forces are

  8. A.

    15 N and 5 N

    B.

    20 N and 5 N

    C.

    15 N and 15 N

    D.

    none of these


  9. If two bodies having masses m1 and m2 (m1>m2) have equal kinetic energies, the momentum of body having mass m1 is __________ the momentum of body having mass m2.

  10. A.

    equal to

    B.

    less than

    C.

    greater than