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Question
Fill in the blanks:
An object falling freely from the roof of a multistorey building has ______ energy and ______ energy when halfway down the building.
An object falling freely from the roof of a multistorey building has ______ energy and ______ energy when halfway down the building.
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Solution
An object falling freely from the roof of a multistorey building has potential energy and kinetic energy when halfway down the building.
Explanation:
- At point A (roof of building), the object is stationary. It will have maximum PE and zero KE.
- At point B (halfway), half of PE changes into KE.
- At point C (just above ground), the entire PE is converted into KE, hence it will have zero PE and maximum KE.
Explanation:
- At point A (roof of building), the object is stationary. It will have maximum PE and zero KE.
- At point B (halfway), half of PE changes into KE.
- At point C (just above ground), the entire PE is converted into KE, hence it will have zero PE and maximum KE.
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