Computing the line integral of the scalar function over the curve

Click For Summary
To compute the line integral of the scalar function f(x,y) = √(1 + 9xy) over the curve defined by y = x^3 from x = 0 to x = 1, parameterization is essential. The suggested parameterization is x = t and y = t^3, leading to the curve represented as R(t) = ⟨t, t^3⟩ for 0 ≤ t ≤ 1. This approach allows for the substitution of the parameterized variables into the function. The integral can then be evaluated using the appropriate limits and the derived expressions. Understanding the parameterization is key to solving the problem effectively.
DrunkApple
Messages
110
Reaction score
0

Homework Statement


f(x,y) = \sqrt{1+9xy}, y = x^{3} for 0≤x≤1


Homework Equations





The Attempt at a Solution


I don't even know how to start this problem. I thought about c(t) since that's all I have been doing, but there isn't even c(t). I only recognize domain. Can anyone help me please?
 
Physics news on Phys.org
Start with parameterization x = t, y = t3 so your curve is given by
\vec R(t) = \langle t, t^3\rangle,\, 0\le t\le 1
 
Question: A clock's minute hand has length 4 and its hour hand has length 3. What is the distance between the tips at the moment when it is increasing most rapidly?(Putnam Exam Question) Answer: Making assumption that both the hands moves at constant angular velocities, the answer is ## \sqrt{7} .## But don't you think this assumption is somewhat doubtful and wrong?

Similar threads

Replies
6
Views
3K
Replies
12
Views
2K
  • · Replies 4 ·
Replies
4
Views
2K
Replies
6
Views
940
Replies
12
Views
4K
  • · Replies 2 ·
Replies
2
Views
2K
Replies
3
Views
2K
  • · Replies 9 ·
Replies
9
Views
1K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 10 ·
Replies
10
Views
2K