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Q.

Which one of these doesn't have kinetic energy?

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a

A ball thrown upwards

b

A battery

c

A moving car

d

A flying bird

answer is B.

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Detailed Solution

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Kinetic energy (KE) is the energy that a body possesses as a result of its motion.

K=12mv2 where m= the mass of the body and v= velocity of the body

  • A ball thrown upwards has some kinetic energy because of its velocity. 
  • A battery is never in motion. There is no kinetic energy in it. Chemical energy is present inside the battery. 
  • A moving automobile has kinetic energy since it is travelling at a certain speed. 
  • A flying bird also moves rather quickly. Hence, have kinetic energy.


 

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