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agasfer [191]
2 years ago
15

- A race car travels on a straight racetrack with a forward velocity of 44 m/s and slows at a constant rate to a velocity of 22

m/s over
11 s. How far does it move during this time?
Physics
1 answer:
Montano1993 [528]2 years ago
6 0

363m is the correct answer to your question!

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Un bombero alejado d = 31.0 m de un edificio en llamas dirige un chorro de agua desde una manguera contra incendios a nivel del
Mila [183]

Answer:

El chorro golpea el edificio a una altura de 15.943 metros con respecto al suelo.

Explanation:

El chorro de agua exhibe un movimiento parabólico, dado que este tiene una inclinación inicial y la única aceleración es debida a la gravitación terrestre. Las ecuaciones cinemáticas que modelan el fenómeno son:

Distancia horizontal (en metros)

x = x_{o} + v_{o}\cdot t \cdot \cos \theta

Donde:

x_{o} - Posición horizontal inicial, medida en metros.

t - Tiempo, medido en segundos.

v_{o} - Velocidad inicial, medida en metros por segundo.

\theta - Angulo de inclinación del chorro de agua, medido en grados sexagesimales.

Distancia vertical (en metros)

y = y_{o} + v_{o}\cdot t \cdot \sin \theta + \frac{1}{2}\cdot g \cdot t^{2}

Donde:

y_{o} - Posición vertical inicial, medida en metros.

g - Constante gravitacional, medida en metros por segundo al cuadrado.

Partiendo de la primera ecuación, se despeja el tiempo:

t = \frac{x - x_{o}}{v_{o}\cdot \cos \theta}

Si x = 31\,m, x_{o} = 0\,m, v_{o} = 40\,\frac{m}{s} and \theta = 33^{\circ}, entonces:

t = \frac{31\,m-0\,m}{\left(40\,\frac{m}{s} \right)\cdot \cos 33^{\circ}}

t = 0.924\,s

La altura máxima se calcula por sustitución directa de términos en la segunda ecuación. Si y_{o} = 0\,m, v_{o} = 40\,\frac{m}{s}, t = 0.924\,s y g = -9.807\,\frac{m}{s^{2}}, entonces:

y = 0\,m + \left(40\,\frac{m}{s} \right)\cdot (0.924\,s)\cdot \sin 33^{\circ} + \frac{1}{2}\cdot \left(-9.807\,\frac{m}{s^{2}} \right) \cdot (0.924\,s)^{2}

y = 15.943\,m

El chorro golpea el edificio a una altura de 15.943 metros con respecto al suelo.

3 0
3 years ago
Calculate the momentum for a 0:2 kg rifle bullet traveling 300m/a
Ksenya-84 [330]

Given data

          mass (m) = 0.2 Kg ,

       velocity (v) =300 m/s ,

      calculate momentum <em>(p) = m × v  </em>

<em>                                                 = 0.2 × 300</em>

<em>                                          </em><em>     P  = 60 Kg. m/s</em>

<em> Momentum of the bullet is 60 Kg. m/s..</em>

7 0
4 years ago
In vision, the amplitude of a light wave relates to people's perception of the brightness of a stimulus. To which perceptual dim
den301095 [7]

Answer:

Loudness

Explanation:

In acoustics, loudness is the subjective perception of sound pressure.

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What causes the magnetic field around the wire?
slamgirl [31]

Answer:ITS B

Explanation: TOOK DA TEST AND GOT IT RIGHT NO CAP YOUR WELCOME

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3 years ago
In order that a train stop safely it'll always pass a signal showing yellow light
SIZIF [17.4K]
This Question is very confusing can you be more descriptive...?

4 0
3 years ago
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