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2 years ago

Find the value of F1 + F2 + F3.

Physics

1 answer:

Dovator [93]2 years ago

8 0

Answer:

F = 0.78[N]

Explanation:

The given values correspond to forces, we must remember or take into account that the forces are vector quantities, that is, they have magnitude and direction. Since we have two X-Y coordinate axes (two-dimensional), we are going to decompose each of the forces into the X & y components.

For F₁

$F_{y}=2[N]$

For F₂

$F_{x}=2*cos(60)\\F_{x}=1[N]\\F_{y}=-2*sin(60)\\F_{y}=-1.73[N]$

For F₃

$F_{x}=-1*sin(60)\\F_{x}=-0.866[N]\\F_{y}=1*cos(60)\\F_{y}=0.5 [N]$

Now we can sum each one of the forces in the given axes:

$F_{x}=1-0.866=0.134[N]\\F_{y}=2-1.73+0.5\\F_{y}=0.77[N]$

Now using the Pythagorean theorem we can find the total force.

$F=\sqrt{(0.134)^{2} +(0.77)^{2}}\\F= 0.78[N]$

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Answer:

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Explanation:

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2 years ago

A physicist drives through a stop light. When he is pulled over, he tells the police officer that the Doppler shift made the red

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Answer:

Speed of physicist car is 0.036c or 1.08 x 10⁷ m/s .

Explanation:

Doppler Effect is defined as the change in frequency or wavelength of the wave as the source or/and observer moving away or towards each other.

In this case, the Doppler effect equation in terms of wavelength is :

$\lambda_{s} = \lambda_{o}\sqrt{\frac{1-\frac{v}{c} }{1+\frac{v}{c} } }$ ......(1)

Here $\lambda_{s}$ is source wavelength, $\lambda_{o}$ is observed wavelength, v is speed of the observer and c is the speed of light.

Given :

Source wavelength, $\lambda_{s}$ = 660 nm = 660 x 10⁻⁹ m

Observed wavelength, $\lambda_{0}$ = 555 nm = 555 x 10⁻⁹ m

Substitute these values in the equation (1).

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$\sqrt{\frac{1-\frac{v}{c} }{1+\frac{v}{c} } } = 0.84$

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$1-\frac{v}{c}=0.7056+0.7056\frac{v}{c}$

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3 years ago

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Explanation:

Value of the cross-sectional area is as follows.

A = $1.5 \times 2.30$

= 3.45 $in^{2}$

The given data is as follows.

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Now, we will calculate maximum load from allowable stress as follows.

$P_{max} = \sigma_{a}A$

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= 50025 lb

Now, maximum load from shear stress is as follows.

$P_{max} = 2 \times \tau_{a} \times A$

= $2 \times 7100 \times 3.45$

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Hence, $P_{max}$ will be calculated as follows.

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3 years ago

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Answer:

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3 years ago

PLEASE HURRY 20 PTS

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Answer:

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Explanation:

The electric force exerted on a charge by an electric field is given by:

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3 years ago

Find the value of F1 + F2 + F3.​

Find the value of F1 + F2 + F3.