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lbvjy [14]
4 years ago
11

A runner is running to the left with a speed of 8.0\,\dfrac{\text m}{\text s}8.0 s m ​ 8, point, 0, start fraction, start text,

m, end text, divided by, start text, s, end text, end fraction when she speeds up with constant acceleration for 2.0\,\text s2.0s2, point, 0, start text, s, end text to reach the finish line. The runner's final speed is 9.9\,\dfrac{\text m}{\text s}9.9 s m ​ 9, point, 9, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction to the left. What was the runner's acceleration as she sped up to the finish line?
Physics
2 answers:
Alla [95]4 years ago
4 0

Answer:

The runner's acceleration as she sped up to the finish line is 0.95m/s²

Explanation:

Acceleration is the change in velocity of a body with respect to time. It is expressed as;

Acceleration = change in velocity/time

Change in velocity = final velocity - initial velocity

Acceleration = final velocity - initial velocity / time

Given initial speed = 8.0m/s

Final speed = 9.9m/s

Time taken = 2.0s

Acceleration = 9.9-8.0 / 2.0

Acceleration = 1.9/2

Acceleration = 0.95m/s²

yawa3891 [41]4 years ago
4 0

Answer:

-0.95

Explanation:

saw it on khan academy

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B. About 12 degrees

Explanation:

The orbital period is calculated using the following expression:

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Now, we divide the expression used to calculate the orbital period of Saturn by the expression used to calculate the orbital period of the earth. Notice that the constants will cancel and we will get the rate of orbital periods in terms of the distances to the sun:

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6 0
3 years ago
Which of the following describes a risk associated with the use of hydropower as an energy source?
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The kinetic energy of the cell phone is 9J

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