Work$Energy

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Across
  1. 3. In a watch P.E of wound spring is converted into _______ energy of the hands of watch.
  2. 4. If momentum of a body is doubled, its Kinetic energy becomes ______ times.
  3. 6. A body is thrown vertically upwards, during its rise the potential energy?
  4. 8. kilowatt hour is the unit of
  5. 9. A girl is carrying a school bag of 3 kg mass on her back and moves 200 m on a leveled road. The work done against the gravitational force will be (g =10 m s–2)
Down
  1. 1. Water stored in a dam possesses _______ energy.
  2. 2. When a body falls freely towards the earth, then its total energy is
  3. 5. Kinetic energy of a body can never be
  4. 7. 1J = 10^x erg. X=?