Grade 8 Exam > Grade 8 Questions > Choose the correctly matched pair:a)Power - R...
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Choose the correctly matched pair:
- a)Power - Rate of doing work
- b)Kinetic Energy - Potential energy of a raised object
- c)Mechanical Energy - Only potential energy
- d)Work - Force divided by distance
Correct answer is option 'A'. Can you explain this answer?
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Choose the correctly matched pair:a)Power - Rate of doing workb)Kineti...
- Option A: Power - Rate of doing work
- This is the correct match. Power is defined as the rate at which work is done. The SI unit of power is watt (W), where 1 W = 1 J/s.
- Option B: Kinetic Energy - Potential energy of a raised object
- This is incorrectly matched. Kinetic energy is the energy possessed by an object due to its motion, not its position. Potential energy is the energy possessed by an object due to its position or height.
- Option C: Mechanical Energy - Only potential energy
- This is incorrect. Mechanical energy is the sum of kinetic and potential energy of an object, not just potential energy.
- Option D: Work - Force divided by distance
- This is incorrect. Work is defined as the force applied on an object multiplied by the distance moved by the object in the direction of the force, not divided by distance.
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Choose the correctly matched pair:a)Power - Rate of doing workb)Kinetic Energy - Potential energy of a raised objectc)Mechanical Energy - Only potential energyd)Work - Force divided by distanceCorrect answer is option 'A'. Can you explain this answer?
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