Q4 - For each of the following

Last updated at September 16, 2026 by

  • ๐Ÿ“‹ Revise, Reflect, Refine, Q4 (Page 137)
    For each of the following situations, identify the energy transformation that takes place:
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    Answer
    Situation Energy transformation
    (i) A truck moving uphill Chemical energy of fuel → Mechanical energy (motion + height)
    (ii) Unwinding of a watch spring Potential energy of spring → Mechanical energy of moving parts
    (iii) Photosynthesis in green leaves Light energy → Chemical energy (stored in food)
    (iv) Water flowing from a dam Potential energy → Kinetic energy
    (v) Burning of a matchstick Chemical energy → Thermal + Light energy
    (vi) Explosion of a fire cracker Chemical energy → Thermal + Light + Sound + Mechanical energy
    (vii) Speaking into a microphone Sound energy → Electrical energy
    (viii) A glowing electric bulb Electrical energy → Light + Thermal energy
    (ix) A solar panel Light energy → Electrical energy
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