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aleksandrvk [35]
3 years ago
11

Which is an example of negative acceleration?

Physics
2 answers:
Jet001 [13]3 years ago
6 0

Answer:

m

Explanation:

Sonja [21]3 years ago
4 0
A graph that starts from the top left decreasing to the bottom right
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The pilot of an airplane notes that the compass indicates a heading due west. the airplane's speed relative to the air is 130 km
Alja [10]
I got 21 once I answer that question
3 0
3 years ago
Pun zapato de golf tiene 10 tacos cada uno con un área de 0.01 pulgadas en contacto con el piso suponga que caminar hay un insta
Mars2501 [29]

Answer:

Las presión ejercida por los tacos sobre el suelo es 900 libras por pulgada cuadrada.

Explanation:

Según la Física, comprendemos que la presión es igual a la fuerza dividida por área. En este caso, el peso de la persona dividida por área total de los tacos de los zapatos de golf suponiendo una distribución uniforme de la fuerza. Es decir:

\sigma = \frac{W}{n\cdot A_{T}} (Eq. 1)

Donde:

\sigma - Presión, medida en libras por pulgada cuadrada.

W - Peso de la persona, medida en libras.

n - Cantidad de tacos en los zapatos, adimensional.

A_{T} - Área del taco, medida en pulgadas cuadradas.

Si conocemos que W = 180\,lb, n = 20 y A_{T} = 0.01\,in^{2}, la presión es:

\sigma = \frac{180\,lb}{(20)\cdot (0.01\,in^{2})}

\sigma = 900\,psi

Las presión ejercida por los tacos sobre el suelo es 900 libras por pulgada cuadrada.

3 0
3 years ago
A student of mass 63.4 kg, starting at rest, slides down a slide 21.2 m long, tilted at an angle of 26.1° with respect to thehor
Vera_Pavlovna [14]

Answer:

fr = 65.46 N ,   a = 8.74 m / s²  and  vf = 19.25 m / s

Explanation:

We write a reference system with an axis parallel to the slide and gold perpendicular axis, in this system we decompose the weight

      sin 21.2 = Wx / W

      cos21.2 = Wy / W

      Wx = W sin21.2

      Wy = W cos 21.2

We form Newton's equations

X axis

      Wx -fr = m a

Y Axis

     N- Wy = 0

     N = Wy

     fr = μ N

     fr = μ (W cos 21.2)

     fr = 0.113 63.4 9.8 cos 21.2

     fr = 65.46 N

We replace and calculate the acceleration

     W sin 21.2 - μ W cos 21.2 = m a

     a = g (sin21.2 - μ cos 21.2)

     a = 9.8 (without 21.2 - 0.113 cos 21.2)

     a = 8.74 m / s²

This acceleration is along the slope of the slide, so we can calculate the distance

     d = 21.2 m

     vf² = v₀² + 2 a d

    vf² = 0 + 2 a d

    vf = √(2 8.74 21.2)

    vf = √ (370,576)

    vf = 19.25 m / s

3 0
3 years ago
A circular loop of radius 5 cm carries a current of 5A, it has a uniform magnetic field of 2,0T. Calculate the magnetic force on
pshichka [43]

Answer:

F = BIl

F » magnetic force

B » magnetic flux density

l » length / circumference

F = BI(2\pi r)

r » radius

F = 2 \times 5 \times (2 \times 3.14 \times 0.05) \\ { \underline{force = 3.14 \:  \: newtons}}

4 0
3 years ago
The spin-drier of a washing machine revolving at 900.RPM slows down uniformly to 300.RPM while making 60. revolutions. Find the
jeyben [28]
<h2>Answer:</h2>

<u>Acceleration is </u><u>-10.57 rad/s²  </u>

<u>Time is </u><u>6 seconds</u>

<h2>Explanation:</h2><h3>a) </h3>

u=900rpm= 94.248 rad/s  

v =300rpm= 31.416 rad/s  

s=60 revolutions= 377 rad  

v²= u²+ 2as  

31.416² = 94.248²+ 2 * a * 377  

a = v²-u² / 2s

a= -10.57 rad/s²  

<h3>b) </h3>

Using 1st equation of motion

v-u/a = t

Putting the values

t = (31.4 - 94.2)/-10.57

t = 6 seconds

3 0
3 years ago
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