CRMS Calculus 2010 February 19, 2010

10
1 mystarbucks.files.wordpress.com__2008_01_ sumoskijumping.jpg Related Rates

description

Related Rates intro and warmup problems

Transcript of CRMS Calculus 2010 February 19, 2010

Page 1: CRMS Calculus 2010 February 19, 2010

1

mystarbucks.files.wordpress.com__2008_01_sumo­ski­jumping.jpg

Related Rates

Page 2: CRMS Calculus 2010 February 19, 2010

2

In calculus we study the relationship between the ________  of  ______________ of variables.

Calculus is the mathematics of ____________,and everything changes with respect to __________.

mystarbucks.files.wordpress.com__2008_01_

sumo­ski­jumping.jpg

mystarbucks

.files.wordpre

ss.com__200

8_01_

sumo­ski­jum

ping.jpg

mystarbucks.files.wordpress.com__2008_01_sumo­ski­jumping.jpg

mystarbucks.files.wordpress.com__2008_01_

sumo­ski­jumping.jpg

mystarbucks

.files.wordpre

ss.com__200

8_01_

sumo­ski­jum

ping.jpg

http://epica­awards.com/assets/epica/2005/finalists/print/images/07070e%20%20%20AirFranceSkiJump.jpg

x = horizontal displacement y = vertical displacement

In algebra we study the relationship between ______________.

Instantaneous rate of change of horizontal displacement with respect totime.

Instantaneous rate of change of vertical displacement with respect totime.

dydt =

http://mathdemos.gcsu.edu/mathdemos/relatedrates/relatedrates.html

dxdt =

changetime

variables

rate change

Page 3: CRMS Calculus 2010 February 19, 2010

3

Let V = volume dV/dt = 2gal/min.

Let V = volume dV/dt = ­3 cm3/s

Let h = height dh/dt = 30 yd/s

Page 4: CRMS Calculus 2010 February 19, 2010

4

x

y

13 m.

Photo by portsmouthmc from Flickr  

Page 5: CRMS Calculus 2010 February 19, 2010

5

2000

y

θhttp://upload.wikimedia.org/wikipedia/commons/thumb/f/fe/ShuttleAtlantis_launch.jpg

or

Page 6: CRMS Calculus 2010 February 19, 2010

6

dV/dt = 5π/3 ≈ 5.2 in3/sA positive value means that the volume is increasing.

dh/dt = ­15/π + 1 ≈ ­3.8 in3/s.A negative value means that the volume is decreasing.

hr

dr/dt = instantaneous rate of change of radius with respect to time

dh/dt = instantaneous rate of change of height with respect to time

dV/dt = instantaneous rate of change of volume with respect to time

Page 7: CRMS Calculus 2010 February 19, 2010

7

Implicit Equations of timeFinding derivatives with respect to time.

Page 8: CRMS Calculus 2010 February 19, 2010

8

Quotient Rule Power Rule

Page 9: CRMS Calculus 2010 February 19, 2010

9

Related Rates

You are given two quantities

•Both are changing

•They have something to do with each other.

You are asked to find out how their rates of change are related to each otherat some particular instant in time.

On tougher related rate problems, you will need to do some algebrato get from what you know to what you are asked to find.

Page 10: CRMS Calculus 2010 February 19, 2010

10