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ASU PHYSICS 121 FINAL EXAM QUESTIONS WITH COMPLETE ANSWERS.
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ASU PHYSICS 121 FINAL EXAM QUESTIONS WITH COMPLETE ANSWERS.
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ASU PHYSICS 121 FINAL EXAMQUESTIONS WITH COMPLETE
ANSWERS
Two wwobjects wware wwthrown wwfrom wwthe wwtop wwof wwa wwtall wwbuilding wwand
wwexperience wwno wwappreciable wwair wwresistance. wwOne wwis wwthrown wwup, wwand
wwthe wwother wwis wwthrown wwdown, wwboth wwwith wwthe wwsame wwinitial wwspeed. wwWhat
wware wwtheir wwspeeds wwwhen wwthey wwhit wwthe wwstreet? ww- wwAnswer wwThey wware
wwtraveling wwat wwthe wwsame wwspeed.
Suppose wwthat wwa wwcar wwtraveling wwto wwthe wwwest ww(the ww-x wwdirection) wwbegins
wwto wwslow wwdown wwas wwit wwapproaches wwa wwtraffic wwlight. wwWhich wwstatement
wwconcerning wwits wwacceleration wwin wwthe wwx wwdirection wwis wwcorrect? ww- wwAnswer
wwIts wwacceleration wwis wwpositive wwbut wwits wwvelocity wwis wwnegative.
For wwgeneral wwprojectile wwmotion, wwwhen wwthe wwprojectile wwis wwat wwthe wwhighest
wwpoint wwof wwits wwtrajectory ww- wwAnswer wwits wwvelocity wwis wwperpendicular wwto wwthe
wwacceleration.
Alice wwand wwTom wwdive wwfrom wwan wwoverhang wwinto wwthe wwlake wwbelow. wwTom
wwsimply wwdrops wwstraight wwdown wwfrom wwthe wwedge, wwbut wwAlice wwtakes wwa
wwrunning wwstart wwand wwjumps wwwith wwan wwinitial wwhorizontal wwvelocity wwof ww25
wwm/s. wwNeither wwperson wwexperiences wwany wwsignificant wwair wwresistance.
wwCompare wwthe wwtime wwit wwtakes wweach wwof wwthem wwto wwreach wwthe wwlake
wwbelow. ww- wwAnswer wwAlice wwand wwTom wwwill wwreach wwthe wwsurface wwof wwthe
wwlake wwat wwthe wwsame wwtime.
A wwpilot wwdrops wwa wwpackage wwfrom wwa wwplane wwflying wwhorizontally wwat wwa
wwconstant wwspeed. wwNeglecting wwair wwresistance, wwwhen wwthe wwpackage wwhits
wwthe wwground wwthe wwhorizontal wwlocation wwof wwthe wwplane wwwill ww- wwAnswer wwbe
wwover wwthe wwpackage.
If wwan wwobject wwtravels wwat wwa wwconstant wwspeed wwin wwa wwcircular wwpath, wwthe
wwacceleration wwof wwthe wwobject wwis ww- wwAnswer wwlarger wwin wwmagnitude wwthe
wwsmaller wwthe wwradius wwof wwthe wwcircle.
, An wwobject wwmoves wwin wwa wwcircular wwpath wwat wwa wwconstant wwspeed. wwWhat wwis
wwthe wwrelationship wwbetween wwthe wwdirections wwof wwthe wwobject's wwvelocity wwand
wwacceleration wwvectors? ww- wwAnswer wwThe wwvelocity wwand wwacceleration wwvectors
wware wwperpendicular.
Shown wwbelow wware wwthe wwvelocity wwand wwacceleration wwvectors wwfor wwa wwperson
wwin wwseveral wwdifferent wwtypes wwof wwmotion. wwIn wwwhich wwcase wwis wwthe wwperson
wwslowing wwdown wwand wwturning wwto wwhis wwright? ww- wwAnswer wwAcceleration wwis
wwdiagonally wwup wwand wwto wwthe wwleft, wwvelocity wwis wwstraight wwdown.
While wwan wwobject wwis wwin wwprojectile wwmotion ww(with wwupward wwbeing wwpositive)
wwwith wwno wwair wwresistance ww- wwAnswer wwthe wwhorizontal wwcomponent wwof wwits
wwvelocity wwremains wwconstant wwand wwthe wwvertical wwcomponent wwof wwits
wwacceleration wwis wwequal wwto ww-g.
Alice wwand wwTom wwdive wwfrom wwan wwoverhang wwinto wwthe wwlake wwbelow. wwTom
wwsimply wwdrops wwstraight wwdown wwfrom wwthe wwedge, wwbut wwAlice wwtakes wwa
wwrunning wwstart wwand wwjumps wwwith wwan wwinitial wwhorizontal wwvelocity wwof ww25
wwm/s. wwNeither wwperson wwexperiences wwany wwsignificant wwair wwresistance. wwJust
wwas wwthey wwreach wwthe wwlake wwbelow ww- wwAnswer wwthe wwspeed wwof wwAlice wwis
wwlarger wwthan wwthat wwof wwTom.
Point wwP wwin wwthe wwfigure wwindicates wwthe wwposition wwof wwan wwobject wwtraveling
wwat wwconstant wwspeed wwclockwise wwaround wwthe wwcircle. wwWhich wwarrow wwbest
wwrepresents wwthe wwdirection wwof wwthe wwacceleration wwof wwthe wwobject wwat wwpoint
wwP? ww- wwAnswer wwThe wwacceleration wwpoints wwtowards wwthe wwcenter wwof wwthe
wwcircle.
An wwobject wwis wwmoving wwto wwthe wwright, wwand wwexperiencing wwa wwnet wwforce
wwthat wwis wwdirected wwto wwthe wwright. wwThe wwmagnitude wwof wwthe wwforce wwis
wwdecreasing wwwith wwtime. wwThe wwspeed wwof wwthe wwobject wwis ww- wwAnswer
wwincreasing.
You wwswing wwa wwbat wwand wwhit wwa wwheavy wwbox wwwith wwa wwforce wwof ww1500 wwN.
wwThe wwforce wwthe wwbox wwexerts wwon wwthe wwbat wwis ww- wwAnswer wwexactly ww1500
wwN wwwhether wwor wwnot wwthe wwbox wwmoves.
You wware wwstanding wwin wwa wwmoving wwbus, wwfacing wwforward, wwand wwyou
wwsuddenly wwfall wwforward wwas wwthe wwbus wwcomes wwto wwan wwimmediate wwstop.
wwThe wwforce wwthat wwpushes wwforward wwon wwyou wwas wwthe wwbus wwstops wwis ww-
wwAnswer wwNo wwforward wwforce wwis wwacting wwon wwyou wwas wwthe wwbus wwstops.
Consider wwwhat wwhappens wwwhen wwyou wwjump wwup wwin wwthe wwair. wwWhich wwof
wwthe wwfollowing wwis wwthe wwmost wwaccurate wwstatement? ww- wwAnswer wwWhen wwyou
wwpush wwdown wwon wwthe wwearth wwwith wwa wwforce wwgreater wwthan wwyour wwweight,
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