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Can kinetic energy be negative? Explain....

Can kinetic energy be negative? Explain.

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As K.E = 1/2 `mv^(2)` . Mass is always positive and `v^(2)` is also positive . Hence , K.E can never be negative .
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MODERN PUBLICATION-WORK, ENERGY AND POWER -Revision Exercise (Very Short Answer Questions)
  1. Does the work done in moving a body depend on the time in which t...

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  2. What is the anglee between force and displacement for maximum work ?

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  3. Can kinetic energy be negative? Explain.

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  4. Can work done by a non - conservative force be positive ?

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  5. Which physical quantity represents the area under the force displace...

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  6. The correct relation between joule and erg is

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  7. What is the work done by the sun on the earth when the earth revolve...

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  8. Can P.E. of an object be negative?

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  9. Is the mechanical energy always conserved ?

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  10. What will happen to the potential energy of an air bubble in water ...

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  11. A spring of spring constant k is cut in three equal pieces. The spring...

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  12. When is KE of a planet revolving around the sun maximum?

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  13. If K.E of a body is made three times , how will the momentum change...

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  14. If the momentum of a body is made three times , how will the kineti...

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  15. A bullet gets embedded in a wooden block. Where does its KE go?

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  16. One horse power is equal to

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  17. What is the power ? Write its dimensional formula .

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  18. How can you say that friction is a non - conservative force ?

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  19. The work done by the centripetal force in quarter revolution would be,

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  20. Can we change K.E of a system without changing its momentum ?

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