Answer:
Characteristic time τ=20 s
When V = 15 m/s
t = 6.66 s
When V = 10 m/s
t = 20 s
When V = 5 m/s
t = 60 s
Explanation:
Given that
c=0.20 N/m(m/s)2
m = 80 kg
Vo=20m/s
Characteristic time τ=m/cvo.
Characteristic time τ=20 s
We know that velocity after t time given as follows
When V = 15 m/s
t = 6.66 s
When V = 10 m/s
t = 20 s
When V = 5 m/s
t = 60 s
The scientific method consists of making an observation, ask a question, formulate hypothesis, predict, test, iterate
The scientific question that can be asked is; <u>What is the </u><u>depth of the well</u>
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The reason why the above question is appropriate is as follows:
The items Jack and Jill found at the well
The information they can get using what they found are;
The time it takes the rock to reach the water surface in the well
The depth of the well
The well's depth, <em>h</em>, is given using the equation of free fall, as follows;
Where;
g ≈ Acceleration due to gravity ≈ 9.81 m/s²
By recording the time each rock takes to reach the water surface in the well, the average depth of the well, , can be found by finding the average of the 9 calculated values for <em>h</em> using the 9 stones
Therefore;
The scientific question that is specific and testable is <u>how </u><u>deep </u><u>is the </u><u>well</u><u>, or what is the well's depth</u>
Learn more about scientific method here: