The position vector of an object is r(t) = ( cos(v2t))i+ ( sin(v2t))j+ (23 – t)k. Calculate the time t it takes for the object to reach z = 0. Then, compute the distance L travelled by the object from time t = 3 until t = 18. What is its speed |v| at t = 3 seconds? t = 23 seconds L = meters |v(3)| meters per second

Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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I have part a complete. I cannot figure out what else to do. I know that to find the arclength, we must take the integral of the magnitude of r'(t); however, I cannot figure out how to take the integral after solving for r'(t).

cos(v/2t))i + ( sin(v2t))j+ (23 – t)k. Calculate the time t it takes for the
The position vector of an object is r(t) =
object to reach z = 0. Then, compute the distance L travelled by the object from time t = 3 until t = 18. What is its speed |v|
3 seconds?
at t
t = 23
seconds
L =
meters
|v(3)|:
meters per second
Transcribed Image Text:cos(v/2t))i + ( sin(v2t))j+ (23 – t)k. Calculate the time t it takes for the The position vector of an object is r(t) = object to reach z = 0. Then, compute the distance L travelled by the object from time t = 3 until t = 18. What is its speed |v| 3 seconds? at t t = 23 seconds L = meters |v(3)|: meters per second
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