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A housefly with a mass of 0.00100 kilograms zooms through the room at a rate of 2.20 m/s. How much kinetic energy does it have?

0.00110 J
0.00220 J
0.00242 J
The height of the fly above the ground must be known to answer this question.

Respuesta :

CintiaSalazar

Considering the definition of kinetic energy, the housefly has a kinetic energy of 0.00242 J.

Kinetic energy

Kinetic energy is a form of energy. It is defined as the energy associated with bodies that are in motion and this energy depends on the mass and speed of the body.

Kinetic energy is defined as the amount of work necessary to accelerate a body of a given mass and in a rest position, until it reaches a given speed. Once this point is reached, the amount of accumulated kinetic energy will remain the same unless there is a change in speed or the body returns to its rest state by applying a force to it.

The kinetic energy is represented by the following expression:

Ec= ½ mv²

Where:

  • Ec is the kinetic energy, which is measured in Joules (J).
  • m is the mass measured in kilograms (kg).
  • v is the speed measured in meters over seconds (m/s).

Kinetic energy of a housefly

In this case, you know:

  • m= 0.00100 kg
  • v= 2.2 m/s

Replacing in the definition of kinetic energy:

Ec= ½ ×0.00100 kg× (2.20 m/s)²

Solving:

Ec= 0.00242 J

Finally, the housefly has a kinetic energy of 0.00242 J.

Learn more about kinetic energy:

brainly.com/question/25959744

brainly.com/question/14028892

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