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kianofou853
05.08.2019 •
Physics
The force on a particle is directed along an x axis and given by f = f0(x/x0 - 1) where x is in meters and f is in newtons. if f0 = 0.98 n and x0 = 4.9 m, find the work done by the force in moving the particle from x = 0 to x = 2x0 m.
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Ответ:
W = 9.604 J
Explanation:
Given data:
Function of force with respect to displacement (x) as:
F = F₀(x/x₀ - 1)
F₀ = 0.98 N
x₀ = 4.9 m
on substituting the values in the given function, we get
F = 0.98 × [(x/4.9) - 1]
Now, the work done is given as:
W = F . dx
substituting the value of force, we have
W = 0.98 × [(x/4.9) - 1] . dx
on integerating the above formula for the limit x = 0 to x = 2x₀ = 2 × 4.9 = 9.8 m
we get
W =![\int\limits^{9.8}_00.98\times[(x/4.9) - 1]} \, dx](/tpl/images/0171/8030/bd12a.png)
or
W =![0.98\times[(x^2/4.9 - x)]^{9.8}_0](/tpl/images/0171/8030/d0ef2.png)
or
W = 0.98 × [(9.8²/4.9 - 9.8) - 0]
or
W = 9.604 J
Ответ:
By using relative dating! Scientists can find the age of a rock by using the law of superposition, which finds the relative age of a rock. The relative age of something is an estimate of how old something is. For example, "This rock looks to be around 1,000 years old!" At the end, you can make connections and eventually find a precise estimate to how old the Earth is.
Explanation:
I hope this helps! (This is in my own words, by the way) :>