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Systems of Part...

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  • Question 1
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  • Question 2
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    A 10 kg body hangs at rest from a rope wrapped around a cylinder 0.2 m in diameter. The torque applied about the horizontal axis of the cylinder is

  • Question 3
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    Which is a vector quantity?

  • Question 4
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    A constant torque acting on a uniform circular wheel changes its angular momentum from A0 to 4A0 in 4 seconds. The magnitude of this torque is

  • Question 5
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    When a torque acting upon a system is zero, then which of the following will be constant?

  • Question 6
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    A door 1.6 m wide requires a force of 1 N to be applied at the free end to open or close it. The force that is required at a point 0.4 m distant from the hinges for opening or closing the door is

  • Question 7
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    A wheel of radius 0.4 m can rotate freely about its axis as shown in the figure. A string is wrapped over its rim and a mass of 4 kg is hung. An angular acceleration of 8 rad–s–2 is produced in it due to the torque. Then, moment of inertia of the wheel is (g = 10 ms–2)

  • Question 8
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  • Question 9
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    A disc of moment of inertia 5 kg–m2 is acted upon by a constant torque of 40 N–m. Starting from rest the time taken by it to acquire an angular velocity of 24 rad/sec is

  • Question 10
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