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Physics Test 120

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Physics Test 120
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  • Question 1
    4 / -1

    A uniform flexible chain of mass m and length 2 l hangs in equilibrium over a smooth horizontal pin of negligible diameter. One end of the chain is given a small vertical displacement so that the chain slips over the pin.The speed of chain when it leaves pin is

  • Question 2
    4 / -1

    A stone is tied with a string and is rotated in a circle horizontally. When the string suddenly breaks, the stone will move

  • Question 3
    4 / -1

    A particle of mass m begins to slide down a fixed smooth sphere from the top. What is its tangential acceleration when it breaks off the sphere ?

  • Question 4
    4 / -1

    A uniform circular disc of radius a is taken. A circular portion of radius b has been removed from it as shown in figure. If the centre of hole is at a distance c from the centre of the disc, the distance x2 of the centre of mass of the remaining part from the intial centre of mass O is given by

  • Question 5
    4 / -1

    A boy of mass m is standing on a block of mass M kept on a rough surface. When the boy walks from left to right on the block, the centre of mass (boy block) of system

  • Question 6
    4 / -1

    The radius of gyration of a uniform rod of length L about on axis passing through its centre of mass is

  • Question 7
    4 / -1

    Three thin rods each of length L and mass M are placed along x,y and z axis such that one end of each rod is at origin. The moment of inertia of this system about z-axis is

  • Question 8
    4 / -1

    A ring and a disc having the same mass, roll without slipping with the same linear velocity. If the kinetic energy of the ring is 8J, that of the disc must be

  • Question 9
    4 / -1

    In case of an orbiting satellite if the radius of orbit is decreased

  • Question 10
    4 / -1

    For a satellite orbiting very close to earth’s surface total energy is

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