Math Problem Statement
Suppose you start at the point (10,10,6) and move 8 units along the curve: x(t)=2t+10,y(t)=4sqrt(t^3)/3+10,z(t)=t^2/2+6 in the positive direction. Where are you now? This is very important to my career, please take your time and go through any necessary steps. ( Hint: Your answer may be quite messy. You do not need to simplify.)
Solution
Let's walk through this step by step, as it's important to be accurate.
Step 1: Understand the position on the curve
You are given the parametric equations of a curve: The goal is to find the new position on the curve after moving 8 units from the initial point .
Step 2: Confirm the initial value of
The initial point is , which corresponds to the initial parameter . To find the value of for which the position on the curve matches this initial point, we solve each parametric equation:
-
For :
So, the initial point corresponds to .
Step 3: Compute the arc length to move along the curve
To find the new position after moving 8 units, we need to compute the arc length along the curve. The formula for the differential of arc length is:
Let's compute the necessary derivatives:
- ,
- ,
- .
Now, we plug these into the arc length formula: Simplifying the expression under the square root:
Thus, the arc length as a function of is:
Step 4: Solve for such that the arc length equals 8
To find the new position after moving 8 units, we need to solve: While this integral doesn't have a simple closed form, we can approach it numerically to find the value of .
Step 5: Calculate the new position
Once we find the value of such that , we can substitute that value back into the parametric equations to find the new coordinates .
Let me calculate the value of that satisfies this condition.After moving 8 units along the curve, you are at the parameter value . The corresponding coordinates on the curve are:
Let me know if you'd like any clarifications or further details!
Here are five related questions to further explore the topic:
- How is arc length calculated for general parametric curves?
- Why is the square root necessary in the arc length formula?
- How do changes in each parametric equation affect the total arc length?
- What happens to the curvature of a curve as increases?
- How would the process differ if the curve was given in Cartesian form?
Tip: Always remember that calculating arc lengths often requires numerical methods unless the integrals simplify nicely.
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Math Problem Analysis
Mathematical Concepts
Parametric Curves
Arc Length
Calculus
Formulas
x(t) = 2t + 10
y(t) = (4sqrt(t^3))/3 + 10
z(t) = t^2/2 + 6
Arc length formula: ds = sqrt((dx/dt)^2 + (dy/dt)^2 + (dz/dt)^2) dt
Theorems
Arc Length Formula for Parametric Curves
Suitable Grade Level
Undergraduate Level (Calculus II or III)
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