All Flashcards
How to find the velocity vector at t=a given a position vector r(t)?
- Find the derivative r'(t). 2. Evaluate r'(a).
How to find the acceleration vector at t=a given a position vector r(t)?
- Find the second derivative r''(t). 2. Evaluate r''(a).
How to find the arc length of a parametric curve from t=a to t=b?
- Find and . 2. Use the formula .
How to find the area of a polar region?
- Determine the limits of integration, a and b. 2. Identify the polar function r(θ). 3. Use the formula .
How to find the area between two polar curves?
- Determine the limits of integration, a and b. 2. Identify the outer curve R(θ) and the inner curve r(θ). 3. Use the formula .
How to find the equation of a tangent line to a parametric curve at t=t₀?
- Find . 2. Evaluate at t=t₀ to find the slope. 3. Find x(t₀) and y(t₀) to find the point. 4. Use point-slope form to write the equation of the tangent line.
How to convert a point from polar coordinates (r, θ) to Cartesian coordinates (x, y)?
- Use the formulas x = r cos(θ) and y = r sin(θ). 2. Substitute the values of r and θ into the formulas. 3. Calculate x and y.
How to find the maximum height of a particle moving according to parametric equations?
- Find . 2. Set and solve for t. 3. Find the y-coordinate at that t value.
How to determine when a particle changes direction in its x-coordinate movement?
- Find . 2. Set and solve for t. 3. Check if the sign of changes around that t value.
How to determine the speed of a particle given its velocity vector?
- Find the velocity vector v(t) = <dx/dt, dy/dt>. 2. Calculate the magnitude of the velocity vector: speed =
What is a parametric equation?
An equation where x and y are defined in terms of a third variable, usually time (t).
Define a vector-valued function.
A function that maps a real number to a vector in a vector space, often representing position, velocity, or acceleration.
What are polar coordinates?
A two-dimensional coordinate system where a point is located by its distance (r) from the origin and angle (θ) from the positive x-axis.
What is arc length?
The distance along a curve defined by a function between two points.
Define a polar function.
A function of the form r = f(θ), where r is the distance from the origin and θ is the angle.
What is a polar plane?
A two-dimensional coordinate system in which the position of a point is determined by the distance from the origin (r) and the angle (theta θ) between the positive x-axis and the line connecting the point to the origin, counterclockwise.
What is the independent variable in a parametric equation?
Time (t).
What are the dependent variables in a parametric equation?
x and y.
What is the Cartesian plane?
The xy-plane, also known as ℝ^2.
What do vector-valued functions represent?
Position, velocity, and acceleration of an object moving in space.
What is the formula for the derivative of a parametric function, ?
What is the formula for the second derivative of a parametric function, ?
What is the formula for arc length of a parametric curve?
What is the formula to find the area of a polar region?
What is the formula to find the area between two polar curves?
How do you convert from polar to Cartesian coordinates?
How do you convert from Cartesian to polar coordinates?
What is the formula for in polar coordinates?
If r(t) = <f(t), g(t)>, what is r'(t)?
r'(t) = <f'(t), g'(t)>
If v(t) = <f(t), g(t)>, what is ∫v(t) dt?
∫v(t) dt = <∫f(t) dt, ∫g(t) dt>