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Work, Power And Energy — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceWork, Power And Energy1 Mark
MCQ
Which of the following does not possess the ability to do work not because motion?
  • A
    A sparrow flying in the sky.
  • B
    A sparrow moving slowly on the ground.
  • ✓
    A sparrow in the nest on a tree.
  • D
    A squiral going up a tree.
✓

Answer

Correct option: C.
A sparrow in the nest on a tree.
We will justify all statements one by one as:
  1. A sparrow flying in the sky possesses kinetic energy, which can be transformed into work.
  2. A sparrow moving slowly on the ground possesses kinetic energy, which can be transformed into work.
  3. A sparrow in the nest does not possess any kinetic energy as it is at rest. It does not possess the ability to do work in terms of motion of the body.
  4. A squirrel going up a tree possesses kinetic energy, which can be transformed into work.

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