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Simple Harmonic Motion Test - 11

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Simple Harmonic Motion Test - 11
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  • Question 1
    1 / -0

    A 1.00×10−20 kg particle is vibrating with simple harmonic motion with a period of 1.00×10−5 s and a maximum speed of 1.00×103 m/s. The maximum displacement of the particle from the mean position is:

    Solution

    Maximum displacement of the particle in SHM is equal to amplitude , a

    So, maximum displacement = amplitide,

     

  • Question 2
    1 / -0

    The bob of a simple pendulum of length L is released at time t = 0 from a position of small angular displacement. Its linear displacement at time t is given by :

    Solution

     

  • Question 3
    1 / -0

    A particle in SHM is described by the displacement function x(t) = A cos(ωt+ϕ), ω = 2π/T. If the initial (t = 0) position of the particle is 1 cm, its initial velocity is π cm s−1 and its angular frequency is πs−1 , then the amplitude of its motion is:

    Solution

     

  • Question 4
    1 / -0

    A body of mass 500 g is attached to a horizontal spring of spring constant 8 π2Nm−1. If the body is pulled to a distance of 10 cm from its mean position, then its frequency of oscillation is :

    Solution

    Here, the mass of the body, m = 500 g = 500 × 10−3 kg

     

  • Question 5
    1 / -0

    A weightless spring that has a force constant k oscillates with frequency n when a mass m is suspended from it. The spring is cut into equal halves and a mass 2m is suspended from one part of the spring. The frequency of oscillation will now become:

    Solution

     

  • Question 6
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    A piece of wood had dimensions a, b and c. Its relative density is d. It is floating in water such that the side c is vertical. It is now pushed down gently and released. The time period is:

    Solution

    Let the distance x of verticle side c of the block be pushed in the liquid when block is floating, then buoyancy force = abxdwg = abxg

    The mass of a piece of wood=abcd

     

  • Question 7
    1 / -0

    The distance covered by a particle undergoing SHM in one time period is: (amplitude=A)

    Solution

    Hint: The distance covered from the mean position to the extreme position is equal to the amplitude.

    Step 1: Find the total distance covered by the particle in one oscillation.

    Total distance = A + A + A + A = 4A

     

  • Question 8
    1 / -0

    A smooth narrow tunnel is dug along the chord of the earth. The  time period of vibration of a small ball dropped from one end of the tunnel is

    Solution

    Time period of a ball in any chord of the earth = 2π√R/g = 84.6 min

     

  • Question 9
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    The time period of vibration of a uniform disc of mass 'M' and radius 'R' about an axis perpendicular to the plane of disc and passing from a point at a distance R/2 from the center of the disc is:

    Solution

     

  • Question 10
    1 / -0

    Two equations of S.H.M. are y= asin(ωt−α) and y= bcos(ωt−α). The phase difference between the two is:

    Solution

     

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