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