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melomori [17]
3 years ago
6

A high-speed train accelerates at a constant rate in a straight line.

Physics
1 answer:
Brilliant_brown [7]3 years ago
8 0

Answer:

1/2

Explanation:

change=

\frac{60 - 30}{60}  =  \frac{30}{60}  =  \frac{3}{6}  =  \frac{1}{2}

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If two objects of the same size move through the air at different speeds, which encounters the greater air resistance?a. The fas
blagie [28]

Answer:

Option A is correct.

(The faster object encounters more resistance)

Explanation:

Option A is correct. (The faster object encounters more resistance)

Air resistance depends on various factors:

  • Speed of the object
  • Cross-sectional area of the object
  • Shape of the object

Formula:

F=\frac{1}{2}C_d\rho A v^{2}

As the speed of the object increases the amount of Air resistance/drag increases on the object, as the above formula shows direct relation between Air resistance/drag and velocity i.e F ∝ v^2.

6 0
3 years ago
POSSIBLE POINTS: 1.92
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A tank circuit consists of an inductor and a capacitor. Give a simple explanation for why the magnetic field in the induc- tor i
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Answer:

If you pull a permanent magnet rapidly away from a tank circuit, what is likely to happen in that circuit?

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4 0
3 years ago
How many atoms are in a sample of 2.39 moles of neon (Ne) atoms?
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4 0
3 years ago
The wheels of an automobile are locked as it slides to a stop from an initial speed of 30.0 m/s. If the coefficient of kinetic f
Amiraneli [1.4K]

Answer:

  x = 76.5 m

Explanation:

Let's use Newton's second law at the point of contact between the wheel and the floor.

     fr = m a

     fr = miy N

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     N = W

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     a = miu g

    a = 0.600 9.8

    a = 5.88 m / s²

Having the acceleration we can use the kinematic relationships to find the distance

     v_{f}² = v₀² + 2 a x

    v_{f} = 0

    x = -v₀² / 2 a

Acceleration opposes the movement by which negative

   x = - 30²/2 (-5.88)

   x = 76.5 m

8 0
3 years ago
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