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AP物理B自测题与解析- AP Physics-B, 2014-2015 McGraw.pdf

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34❯STEP2.DetermineYourTestReadiness

❯DiagnosticTest

Kinematics

1.WhichofthefollowingmustbetrueofanobjectT1

thatisslowingdown?

T3T2

(A)Itsaccelerationmustbenegative.

(B)Itsvelocitymustbesmallerthanitsacceleration.

4.Theboxpicturedabovemovesatconstantspeed

(C)Itmustexperiencemorethanoneforce.

totheleft.Whichofthefollowingiscorrect?

(D)Itsaccelerationanditsvelocitymustbein

oppositedirections.(A)Thesituationisimpossible.Becausemore

(E)Itsvelocitymustbenegative.forcesactright,theblockmustmovetothe

right.

2.Abaseballisthrownstraightup.Itreachesa(B)TT+T

peakheightof15m,measuredfromtheground,312

(C)TT+T

inatimeof1.7s.Treating“up”asthepositive312

(D)T=T+T

direction,whatistheaccelerationoftheball312

(E)Arelationshipamongthethreetensions

whenitreachesitspeakheight?cannotbedeterminedfromtheinformation

(A)0m/s2

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