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marysya [2.9K]
3 years ago
12

Which scenario best describes motion? a toy train in position 4 on a number line a race track that is 100 meters long a ball rol

ling from point A to point B a student living 150 miles from Chicago
Physics
2 answers:
Alexxx [7]3 years ago
8 0

ball rolling from point A to point B

leva [86]3 years ago
6 0
The toy train, the race track, and the student aren't moving.

The rolling ball is, so it's an example of motion.

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Answer:

a) F=2.048\times 10^{-7}\ N

b) a=0.1138\ m.s^{-2}

Explanation:

Given:

  • mass of raindrops, m=1.8\times 10^{-6}\ kg
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A)

<u>From the Coulomb's Law the force between the charges is given as:</u>

F=\frac{1}{4\pi.\epsilon_0} .\frac{q_1.q_2}{r^2}

we have:

\epsilon_0=8.854\times 10^{-12}\ C^2.N^{-1}.m^{-2}

<em>Now force:</em>

F=\frac{1}{4\pi\times 8.854\times 10^{-12}} .\frac{21\times 10^{-12}\times 21\times 10^{-12}}{0.0044^2}

F=2.048\times 10^{-7}\ N

B)

<u>Now the acceleration on the raindrops due to the electrostatic force:</u>

a=\frac{F}{m}

a=\frac{2.048\times 10^{-7}}{1.8\times 10^{-6}}

a=0.1138\ m.s^{-2}

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