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Vanyuwa [196]
3 years ago
14

.An airplane accelerates down a runway at

Physics
1 answer:
solniwko [45]3 years ago
6 0

Starting from rest, the plane travels a distance

<em>x</em> = 1/2 <em>at</em>²

with acceleration <em>a</em> after time <em>t</em>. In this instance, it travels

<em>x</em> = 1/2 (3.20 m/s²) (32.8 s)²

<em>x</em> ≈ 1720 m

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What do we call the minimum energy that is required by an electron to leave the metal target in the photoelectric effect?Select
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Two forces, one of 100 ponds and the other 150 pounds act on the same object, at angles of 20°and 60°, respectively, withthe pos
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<h2>Resultant is 235.54 pounds at an angle 44.16° to X axis.</h2>

Explanation:

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           F₁ = 100 cos 20 i  +  100 sin 20 j

           F₁ = 93.97 i  +  34.20 j          

That is force 2 is 150 pound with x axis at 60°

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F₁ +  F₂ =  93.97 i  +  34.20 j + 75 i  +  129.90 j

F₁ +  F₂ =  168.97 i  +  164.10 j

\texttt{Magnitude = }\sqrt{168.97^2+164.10^2}\\\\\texttt{Magnitude = }235.54pounds\\\\\texttt{Angle = }tan^{-1}\left ( \frac{164.10}{168.97}\right )\\\\\texttt{Angle = }44.16^0

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Both objects have the same magnitude of momentum.

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Similarly, the momentum of the 1\; {\rm g} (10^{-3}\; {\rm kg}) object moving at a speed of 100\; {\rm m\cdot s^{-1}} would be 10^{-3}\; {\rm kg} \times 100\; {\rm m\cdot s^{-1}} = 0.1\; {\rm kg \cdot m \cdot s^{-1}}.

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