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Nata [24]
3 years ago
10

Sally goes on a hike. The distance she walks compared to the amount of time she walks is shown on the graph. Which statement is

not true?
A.
The longer Sally walks, the farther she travels.
B.
Sally does not walk from the 6th to the 7th hour.
C.
Sally walks at a constant rate.
D.
Sally walks fastest from the 3rd hour to the 4th hour.
Physics
1 answer:
Neko [114]3 years ago
5 0
According to the task there should be the graph that supports Sally's hike, but after looking on the options it seems that Sally doesn't walks at a constant rate and there is the negative option that coincides with my thoughts. So, I bet the false statement is the third option represented in the scale above.
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Answer:

Height of the rocket be one minute after liftoff is 40.1382 km.

Explanation:

v(t)=-gt-v_e\times \ln \frac{m-rt}{m}

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g = Acceleration due to gravity =9.8 m/s^2

v_e = Constant velocity relative to the rocket = 2,900m/s.

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t = 1 minute = 60 seconds'

Substituting all the given values in in the given equation:

v(60)=-9.8 m/s^2\times 60 s-2,900m/s\times \ln (\frac{29,000 kg-170 kg/s\times 60 s}{2,9000 kg})

v(60) = 668.97 m/s

Height of the rocket = h

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668.97 m/s=\frac{h}{60 s}

h=668.97 m/s\times 60 s=40,138.2 m = 40.1382 km

Height of the rocket be one minute after liftoff is 40.1382 km.

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Your answer would be:

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Answer:

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