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Laws of Motion ...

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  • Question 1
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  • Question 2
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    Two bodies A and B each of mass m are fixed together by a mass less spring A force F acts on the mass B as shown in figure. At the instant shown, a body A has an acceleration a. what is the acceleration of B?

  • Question 3
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  • Question 4
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    A mass of 6 kg is suspended by a rope of length 2 m form the ceiling. A force of 50 N in the horizontal direction is applied at the mid Point P of the rope- as shown in figure. what is the angle the rope makes with the vertical in equilibrium ? (g = 10 ms–2) Neglect mass of the rope.

  • Question 5
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  • Question 6
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  • Question 7
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    Assertion : Frictional forces are conservative forces.
    Reason : Potential energy can be associated with frictional forces.

  • Question 8
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    Assertion : A body of mass 1 kg is moving with an acceleration of 1 ms–1. The rate of change of its momentum is 1 N.
    Reason : The rate of change of momentum of body = force applied on the body.

  • Question 9
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    Assertion : A body falling freely under gravity becomes weightless.
    Reason : R = m(g – a) = m(g – g) = 0

  • Question 10
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    Assertion : It is difficult to move bike with its breaks on.
    Reason : Rolling friction is converted into sliding friction, which is comparatively larger

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