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Laws of Motion ...

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  • Question 1
    4 / -1

    When the speed of a moving body is doubled

  • Question 2
    4 / -1

    A force of 100 dyne acts on a mass of 5 g for 10 s. Thevelocity produced is

  • Question 3
    4 / -1

    A boy having a mass equal to 50 kilograms is standing in an elevator. The force felt by the feet of the boy will be greatest when the elevator(g=9.8m/s2)

  • Question 4
    4 / -1

    There is a simple pendulum hanging from the ceiling of a lift. When the lift is stand still, the time period of the pendulum is T. If the resultant acceleration becomes g / 4, then the new time period of the pendulum is

  • Question 5
    4 / -1

    The ratio of the weight of a man in a stationary lift and when it is moving downward with uniform acceleration \'a \' is 3 : 2. The value of \'a\' is (g-Acceleration due to gravity of the Earth)

  • Question 6
    4 / -1

    The spring balance inside a lift suspends an object. As the lift begins to ascend, the reading indicated by thespring balance will

  • Question 7
    4 / -1

    In an elevator moving vertically up with an acceleration g, the force exerted on the floor by a passenger of mass M is

  • Question 8
    4 / -1

    A mass 1 kg is suspended by a thread it is
    (i) lifted up with an acceleration 4.9 m/s2
    (ii) lowered with an acceleration 4.9 m/s2.
    The ratio of the tensions is

  • Question 9
    4 / -1

    The time in which a force of 2 N produces a change in momentum of 0.4 kg ms–1 in the body is

  • Question 10
    4 / -1

    A cork is submerged in water by a spring attached to the bottom of a pail. When the pail is kept in a elevator moving with an acceleration downwards, the spring length

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