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Stone has energy when it is lifted at a height. Why?​

User Bakamike
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17 votes

Answer:

Step-by-step explanation:

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The question really means, what kind of energy? It immediately takes on the energy associated with the height.

Potential Energy = mgh

  • m is the mass of the stone
  • g = 9.81 in the metric system
  • h = the height measured where the stone is.

Now if you are the one holding the stone, and you let go then immediately the stone takes on both Potential Energy (which is going down in value because the height is going down) and Kinetic Energy (because the stone is moving faster as it falls).

Kinetic Energy = 1/2 mv^2

So there cannot be Kinetic energy until the stone is released from a certain height. Until it is released, the stone has energy because when released, it will pick up energy because of increasing velocity.

User Anthony Hilyard
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