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{SECT 0 {EXCHG {PARA 18 "" 0 "" {TEXT -1 39 "Computer Intensive Physic

s\nPhysics 211\n" }}}{EXCHG {PARA 19 "" 0 "" {TEXT -1 164 "\nSteven R.

 Dunbar\nDepartment of Mathematics and Statistics\nUniversity of Nebra

ska-Lincoln\nLincoln, NE, 68588\n\nsdunbar@math.unl.edu\nhttp://www.ma

th.unl.edu/~sdunbar\n" }}}{EXCHG {PARA 0 "" 0 "" {TEXT -1 261 "\nHomew

ork 2:  1D Dynmaics\n\nTopic:  1D Dynamics (No/low friction with visib

le applied forces)\n\nTitle:  Forces that Vary with Time\n\nKeywords: \+

 F=ma, Newton's Second Law, Acceleration, Velocity, Position\n\nAudien

ce:  Students, Homework using computer lab\n\nTime:  30" }}}{SECT 0 

{PARA 3 "" 0 "" {TEXT -1 41 "Homework Problem on Time-Dependent Forces

" }}{EXCHG {PARA 0 "" 0 "" {TEXT -1 311 "A sporty red automobile has a

 mass of 1000 kg.\n\nThe automobile starts from rest, goes forward in \+

first gear, then shifts into  second gear, shifts into third gear, the

n finally gets to fourth gear.\n\nThe force applied to the drive wheel

s from the engine through the transmission is \nF = 1000*(sin(Pi*t) + \+

Pi*t) N" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 39 "m := 1000;    # \+

to help you get started" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 59 "

F := 250*(sin(Pi*t) + Pi*t);   # Pi = math constant 3.14..." }}}{SECT 

0 {PARA 4 "" 0 "" {TEXT -1 6 "part 1" }}{EXCHG {PARA 257 "" 0 "" 

{TEXT -1 147 "1 (a)  Plot the acceleration of the automobile on the in

terval from t = 0 to t = 10.\n   (b) When does the car shift from firs

t gear to second gear?" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 0 "" 

}}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 0 "" }}}{EXCHG {PARA 257 "" 

0 "" {TEXT -1 63 "             ANS:  The car shifts from first to seco

nd at ....." }}{PARA 257 "" 0 "" {TEXT -1 1 " " }}}}{EXCHG {PARA 257 "

" 0 "" {TEXT -1 94 "3.  How long does it take to go from from 0 m/s to

 30 m/s?  ( for reference 30 m/s = 67 mi/hr)" }}}{SECT 0 {PARA 4 "" 0 

"" {TEXT -1 6 "part 2" }}{EXCHG {PARA 257 "" 0 "" {TEXT -1 71 "2.  Fin

d and plot the velocity of the car over the time t = 0 to t = 10" }}}

{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 0 "" }}}{EXCHG {PARA 0 "> " 0 "

" {MPLTEXT 1 0 0 "" }}}}{SECT 0 {PARA 4 "" 0 "" {TEXT -1 6 "part 3" }}

{EXCHG {PARA 257 "" 0 "" {TEXT -1 94 "3.  How long does it take to go \+

from from 0 m/s to 30 m/s?  ( for reference 30 m/s = 67 mi/hr)" }}}

{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 0 "" }}}{EXCHG {PARA 0 "> " 0 "

" {MPLTEXT 1 0 0 "" }}}{EXCHG {PARA 257 "" 0 "" {TEXT -1 51 "         \+

ANS:  The car reaches 30 m/s at time ....." }}}}{SECT 0 {PARA 4 "" 0 "

" {TEXT -1 6 "part 4" }}{EXCHG {PARA 257 "" 0 "" {TEXT -1 144 "4.  (a)

 What is the average acceleration over the time interval from question

 3? \n     (b) What is the maximum acceleration over this interval? " 

}}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 0 "" }}}{EXCHG {PARA 0 "> " 

0 "" {MPLTEXT 1 0 0 "" }}}}{SECT 0 {PARA 4 "" 0 "" {TEXT -1 6 "part 5

" }}{EXCHG {PARA 257 "" 0 "" {TEXT -1 92 "5.   (a) Find and plot the d

istance covered by the car over the inteval found in question 3." }}}

{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 0 "" }}}{EXCHG {PARA 0 "> " 0 "

" {MPLTEXT 1 0 0 "" }}}{EXCHG {PARA 257 "" 0 "" {TEXT -1 73 "       AN

S:  The distance covered by the car by time .....    is ........" }}}}

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