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SVEN [57.7K]
4 years ago
14

What is the kinetic energy of a 2000 kg car moving at 72 km/h?

Physics
1 answer:
gtnhenbr [62]4 years ago
7 0

kinetic energy is given by 1 /2

\times mass \:  \times  \: velocity {?}^{2}then you have to replace the figures

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En un instante pasa por A un cuerpo con MRU de 20 m/seg, 5 segundos después pasa en su persecución, por el mismo punto A otro cu
sukhopar [10]

Answer:

Los cuerpos se encuentran luego de 15 segundos a los 300 metros.

Explanation:

El movimiento rectilíneo uniforme (MRU) es el movimiento que describe un cuerpo o partícula a través de una línea recta a velocidad constante. Es decir, que en este caso el movimiento es lineal en una única dirección  y la velocidad de desplazamiento es constante.

La posición del cuerpo después de un tiempo se calcula a partir de la posición inicial y de la velocidad del cuerpo mediante la expresión:

x=x0+v⋅t

donde:

  • x0 es la posición inicial.
  • v es la velocidad que tiene el cuerpo a lo largo del movimiento.
  • t es el intervalo de tiempo durante el cual se mueve el cuerpo.

En este caso, si el tiempo empleado por el primer cuerpo es t, el del segundo que sale 5 segundos más tarde será t-5. Siendo la velocidad del primer cuerpo 20 m/s y la del segundo cuerpo 30 m/s, entones la posición de cada uno será:

x1 = 20 m/s* t

x2 = 30 m/s* (t - 5 s)

Ambos se encuentran cuando sus posiciones son iguales:

x2=x1

30*(t - 5) = 20*t

30*t - 30*5= 20*t

30*t - 150 = 20 t

30*t - 20*t= 150

10*t= 150

t= 150÷10

t=15 segundos

Reemplazando en la expresiones de posición obtienes:

x1 = 20 m/s* 15 s= 300 m

x2 = 30 m/s* (15 s - 5 s)= 300 m

<u><em>Los cuerpos se encuentran luego de 15 segundos a los 300 metros.</em></u>

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What are the independent, dependent and controlled variables in my science lab? The lab is about how the steepness of a ramp aff
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Hope it helps you please mark brainliest

Explanation:

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3 years ago
It is considered aerobic dance if you dance 3-4 times a week for at least 45 minutes each time.
balandron [24]

Answer:

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Explanation:

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The 17 foot ladder leans against a wall from a point that 3.3 feet away from the wall on the ground. What is the angle between t
Inessa05 [86]

Answer:

11.2°

Explanation:

Using the trigonometry ratio,

Note: Assuming the ladder, the wall and the horizontal forms a right angle triangle.

Cosθ = Opposite/Hypotenuse

SinΦ = O/H.......................... Equation 1

Where Φ = angle between the ladder and the wall, O = opposite, H =Hypotenuse.

make Ф the subject of the equation,

Ф = sin⁻¹(O/H).................. Equation 2

Given: O = 3.3 foot, H = 17 foot

Ф = sin⁻¹(3.3/17)

Ф = sin⁻¹(0.194/

Ф = 11.19°.

Ф = 11.2° ( to the nearest tenth degree)

Hence the ladder and the wall makes an angle of 11.2°

7 0
3 years ago
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