kayleekirkland4 kayleekirkland4
  • 12-05-2020
  • Physics
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A 4 kg object possesses 18 J of kinetic energy. What is its velocity?

Respuesta :

AL2006
AL2006 AL2006
  • 12-05-2020

The kinetic energy of any object is . . . . . (1/2) · (mass) · (speed²) .

For this object . . . . .  18J = (1/2) · (4 kg) · (speed²)

Divide each side by 2 kg . . . . .  9 m²/s² = speed²

Square root each side . . . . .  3 m/s = speed

We can't calculate the velocity because we don't know anything about the direction the object is moving.

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