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Sav [38]
3 years ago
9

If only one external force acts on a particle, does it necessarily change the particle's kinetic energy and velocity? (select al

l that apply.)
Physics
1 answer:
ivann1987 [24]3 years ago
7 0
It's necessary to change the particles kinetic and velocity to open external and eternal.
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A baseball player slides into third base with an initial speed of 4.0 m/s. If the coefficient of
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The frictional force is given by F = μmg 

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<span>The m's cancel μgd = v² / 2 </span>



<span>d = v² / 2μg </span>

<span>d = 8² / 2(0.41)(9.8) </span>

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<span>Note. In your other example μ = 0.46 and v = 4 m/s </span>



<span>d = v² / 2μg </span>




<span>= 4² / 2(0.46)(9.8) </span>

<span>= 8 / (0.46)(9.8) </span>

<span>= 1.77 or 1.8 m.
</span>
Hope i Helped :D
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1. A pendulum has a period of 3 seconds. What's its frequency? 2. A pendulum has a frequency of 0.25 Hz. What's its period? 3. A
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Answer:

(1) 0.333 Hz

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(3) It is given that a pendulum makes 10 back and forth swings in 20 seconds

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So time period T = 2 sec

Frequency will be equal to f=\frac{1}{T}=\frac{1}{2}=0.5Hz

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The answer depends heavily on what 'objects' you're talking about.
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Which of these BEST explains how Earth's surface features are formed by moving tectonic plates? *
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The spinning of Earth's outer core causes the lithosphere to break into individual plates and collide with each other.

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