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Laws of Motion ...

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  • Question 1
    4 / -1

    A conveyor belt is moving at a constant speed of 2 m/s. A box is gently dropped on it. The coefficient of friction between then is µ = 0.5. The distance that the box will move relative to belt before coming to rest on it, taking g = 10 ms–2 is

  • Question 2
    4 / -1

    A block of base 10 cm × 10 cm and height 15 cm is kept on an inclined plane. The coefficient of friction between them √3. The inclination θ of this inclined plane from the horizontal plane is gradually increased from 0°. Then

  • Question 3
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    A block is at rest on an inclined plane making an angle αwith the horizontal. As the angle α of the incline is increased, the block starts slipping when the angle of inclination becomes θ. The coefficient of static friction between the block and the surface of the inclined plane is or a body starts sliding down at an angle θ to horizontal. Then coefficient of friction is equal to

  • Question 4
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    A given object takes n times as much time to slide down a 45° rough incline as it takes to slide down a perfectly smooth 45° incline. The coefficient of kinetic friction between the object and the incline is given by

  • Question 5
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    The force required just to move a body up an inclined plane is double the force required just to prevent the body sliding down. If the coefficient of friction is 0.25, the angle of inclination of the plane is

  • Question 6
    4 / -1

    Starting from rest, a body slides down a 45° inclined plane in twice the time it takes to slide down the same distance in the absence of friction. The coefficient of friction between the body and the inclined plane is

  • Question 7
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    The coefficient of friction between a body and the surface of an inclined plane at 45° is 0.5. Ifg = 9.8 m/s2, the acceleration of the body downwards in m/s2

  • Question 8
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    A block is kept on an inclined plane of inclination θ of length l The velocity of particle at the bottom of inclined plane is (the coefficient of friction is µ)

  • Question 9
    4 / -1

    A brick of mass 2 kg begins to slide down on a plane inclined at an angle of 45° with the horizontal. Theforce of friction will be

  • Question 10
    4 / -1

    The upper half of an inclined plane of inclination θ is perfectly smooth while the lower half is rough. A body starting from the rest at top comes back to rest at the bottom, if the coefficient of friction for the lower half is given by

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