Pavati Grover
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When a carpet is beaten with a stick, dust comes out of it. Explain.

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NCERT Solutions for Class 9 Science Chapter 9
Force and Laws of Motion
NCERT Books for Session 2022-2023
CBSE Board and UP Board
Exercises Questions
Page No-128
Questions No-2

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2 Answers

  1. When a carpet is beaten with a stick, the mechanical action causes the emergence of dust and particles that have accumulated within the carpet over time. Several factors contribute to this phenomenon.

    Accumulated Debris:
    Carpets accumulate dust, dirt, and particles within their fibers and beneath the surface due to daily use and environmental factors.

    Mechanical Disturbance:
    The impact of beating the carpet with a stick creates mechanical disturbance and vibration within its structure.

    Loosening Particles:
    This mechanical force causes the carpet fibers to flex, dislodging and releasing the trapped particles embedded within the carpet’s structure.

    Airborne Release:
    The sudden impact and vibrations generate a disturbance, ejecting the dislodged particles into the air.

    Dislodging from Pile:
    Particles trapped within the carpet pile due to gravity or electrostatic forces are forcefully dislodged by the kinetic energy applied during beating.

    Conclusion:
    Beating a carpet dislodges and releases accumulated dust and debris trapped within its fibers. This mechanical action causes the particles to loosen and become airborne, contributing to a cleaner carpet surface. Regular cleaning methods, including beating or vacuuming, aid in maintaining a cleaner and healthier indoor environment by removing embedded dust and particles from carpets.

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  2. Inertia of an object tends to resist any change in its state of rest or state of motion.
    When a carpet is beaten with a stick, then the carpet comes to motion. But, the
    dust particles try to resist their state of rest. According to Newton’s first law of
    motion, the dust particles stay in a state of rest, while the carpet moves. Hence,
    the dust particles come out of the carpet.

    For more answers visit to website:
    https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-9/

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