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What is the kinetic energy of a 4 kg rock falling through the air at 5 m/s

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[tex]\large \rm {\color{blue}{Question:}}[/tex]

What is the kinetic energy of a 4 kg rock falling through the air at 5 m/s

[tex]\small \rm {\color{red}{Answer:}}[/tex]

K.E = 5 kgm/s J

Explanation:

To find the K.E/Kinetic Energy you have to use this formula.

  • K.E = ½mv²

Where is K.E = Kinetic Energy, m = mass, v² = velocity/speed squared

How to solve?

1.)Identify the given

  • Given :

Mass of rock is 4 kg

Velocity/speed of rock falling through air is 5 m/s.

2.)Solve

  • K.E = ½mv²
  • K.E = ½4 kg (5 m/s)²
  • K.E = ½4 kg (25 m/s)
  • K.E = ½100 kgm/s
  • K.E = 5 kgm/s

Therefore, the Kinetic Energy of the rock is 5 kgm/s.

Hope it helps

By : セン

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