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Can kinetic energy be negative? Why?...

Can kinetic energy be negative? Why?

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Kinetic energy cannot be negative.
`E_(k)=(1)/(2)mv^(2)`. The mass (m) of an object cannot be negative.
The velocity of an object can be negative. But the square of velocity `(v^(2))` cannot be negative.
As mass and the square of velocity can never be negative, the kinetic energy of an object cannot be negative.
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Knowledge Check

  • Which one among kinetic energy, potential energy and mechanical energy cannot be negative?

    A
    kinetic energy
    B
    potential energy
    C
    mechanical energy
    D
    Both 'B' and 'C'
  • Which one among kinetic energy, potential energy and mechanical energy cannot be negative?

    A
    kinetic energy
    B
    potential energy
    C
    mechanical energy
    D
    Both 'B' and 'C'
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