contestada

The engine of a car is usually no more than 20% efficient. In other words, for every 100 J of energy produced by the engine, 20 J are
converted into kinetic energy of the car and 80 J are lost to heat.
Assuming 20% efficiency, the amount of energy needed to move a car 1 km with an average force of 2000 N is

Respuesta :

Eduard22sly

The amount of energy needed to move the car is 4×10⁵ J

Determination of the energy produced.

  • Force (F) = 2000 N
  • Distance (d) = 1 Km = 1000 m
  • Energy (E) =?

E = Fd

E = 2000 × 1000

E = 2×10⁶ J

Determination of the actual energy needed to move the car to 1 Km

From the question given above,

For 100 J of energy produced by the engine, 20 J is needed.

Therefore,

For 2×10⁶ J of energy produced = (2×10⁶ × 20) / 100 = 4×10⁵ J is needed.

Thus, 4×10⁵ J of energy is needed to move the car.

Learn more about energy:

https://brainly.com/question/8664733

Otras preguntas