Laplace Transforms and Unit Step Functions

This video tutorial explains how to determine the Laplace transform of a piecewise function. It begins with an introduction to the Laplace transform and the unit step function, followed by an analysis of the graph of the function f(t). The tutorial then covers the formulas for the Laplace transform using unit step functions and demonstrates how to express f(t) in terms of these functions. The process of simplifying f(t) is shown, leading to the final calculation of the Laplace transform.

What is the purpose of using the unit step function in the context of Laplace transforms?

• To simplify the function into a single expression

• To make the function continuous

• To convert the function into a polynomial

• To eliminate discontinuities in the function

Tags

CCSS.HSF-IF.C.7B

How is the piecewise function f(t) defined for t less than 2?

• f(t) = t

• f(t) = 4(t - 2)

• f(t) = 16

• f(t) = 0

Tags

CCSS.HSF.IF.A.2

What is the value of f(t) when t is greater than or equal to 6?

• 16

• 4(t - 2)

• t

• 0

Which unit step function is used to represent the interval where t is between 2 and 6?

• u(t - 2)

• u(t - 6)

• u(t - 2) - u(t - 6)

• u(t)

What is the next step after expressing f(t) using unit step functions?

• Calculate the derivative

• Integrate the function

• Simplify the expression

• Apply the Laplace transform

What is the Laplace transform of a function multiplied by a unit step function?

• e^(-cs) times the Laplace transform of the function

• The derivative of the function

• The integral of the function

• The function itself

What is the Laplace transform of 4t?

• 4t/s

• 4/s^2

• 4/s

• 4t/s^2

How is the final expression of the Laplace transform of f(t) structured?

• As a sum of two transforms

• As a difference of two transforms

• As a quotient of two transforms

• As a product of two transforms

What is the common denominator in the final Laplace transform expression?

• s

• s^2

• s^3

• s^4

What is the final form of the Laplace transform of the given piecewise function?

• 4e^(-2s)s^2 - 4e^(-6s)s^2

• 4e^(-2s) - 4e^(-6s)

• 4e^(-2s)/s^2 - 4e^(-6s)/s^2

• 4e^(-2s)/s - 4e^(-6s)/s