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3 years ago

8

For an object to be in static equilibrium, the net force must be equal to zero and and The center of gravity must be above the s

upport point. The moment of inertia must be zero. The normal force must equal the weight. The net torque must be equal to zero.

1 answer:

iren [92.7K]3 years ago

8 0

Answer:

The normal force must equal the weight.

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Atomic Number
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a train traveling at 30m/s comes to a complete stop in 20 sec.how far did the train go during the deceleration

elixir [45]

Answer:

600m

Explanation:

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A train traveling at 6.4 m/s accelerates at 0.10 m/s 2 over a distance of 100 m. How large is the train’s final velocity?

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The final velocity of the train at the end of the given distance is 7.81 m/s.

The given parameters;

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acceleration of the train, a = 0.1 m/s²
distance traveled, s = 100 m

The final velocity of the train at the end of the given distance is calculated using the following kinematic equation;

v² = u² + 2as

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v² = 60.96

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v = 7.81 m/s

Thus, the final velocity of the train at the end of the given distance is 7.81 m/s.

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How does the direction of the electric current, moving across a battery powered device, differ from the direction of travel in t

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They both have different wave traction's

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Plain electromagnetic wave (in air) has a frequency of 1 MHz and its B-field amplitude is 9 nT a. What is the wavelength in air?

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Answer:

Part a)

$\lambda = 300 m$

Part b)

$E = 2.7 N/C$

Part c)

$I = 9.68 \times 10^{-3} W/m^2$

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Explanation:

Part a)

As we know that frequency = 1 MHz

speed of electromagnetic wave is same as speed of light

So the wavelength is given as

$\lambda = \frac{c}{f}$

$\lambda = \frac{3\times 10^8}{1\times 10^6}$

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Part b)

As we know the relation between electric field and magnetic field

$E = Bc$

$E = (9 \times 10^{-9})(3\times 10^8)$

$E = 2.7 N/C$

Part c)

Intensity of wave is given as

$I = \frac{1}{2}\epsilon_0E^2c$

$I = \frac{1}{2}(8.85 \times 10^{-12})(2.7)^2(3\times 10^8)$

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Pressure is defined as ratio of intensity and speed

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$P = 3.22 \times 10^{-11} N/m^2$

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