LL41-L50_cp09te_LAB.indd 9 4 1 - L 5 0 _ c p 0 9 t e _ L A B . i n d d © Pearson Education, Inc., or its affiliates. All rights reserved.

9 1. Step 2: bandsshouldbetaut. The rubber tom ofthecup(seeFigure A).Hang thewashersover thelipofcup. inside. Use bandsinplaceunderthebot- apapercliptoholdtherubber tic foamorpapercup. Fit bandsthrough theholefrom therubber the a smallholeaboutthediameterofpencilthrough thebottom ofaplas- Knot eachendaround awasherandtapethe washerstotheends. Poke Step 1: Procedure to Earth’s surface. Both casesinvolvefree fall. italsomovesthe earth, velocity ofthespacevehicleensureshorizontal thatasitfalls face) asitfallstoward soiteventuallyhitstheearth. theearth, The elevator hasno runaway ference elevator between andthespacevehicleisthat therunaway you wouldfeelinsideanelevator withasnappedcable! dif- The primary astronauts andthespacevehicleare infree fall.It similartohow isvery magnitude asonEarth’s surface. feel condition iscommonlyreferred toas “zero- vehicle appearweightless, thepullofgravity uponthemiszero. This Some peoplebelievethatbecauseastronauts aboard anorbitingspace large paperclip Discussion water maskingtape 2 washersorothersmallmasses bands 2 longrubber 2 plasticfoamorpapercups Required Equipment/Supplies To theeffectsofgravity onobjectsinfree observe fall Purpose hpe 3 nvra rvtto Free Fall Chapter 13: UniversalGravitation Name Period Date Whathappenstothewashers? weightless, gravity 43 The keytounderstandingthisconditionisrealizing thatboththe Drop thecupfrom aheightofabout 2m. band. bandstomake onelongrubber Knottogethertworubber

Apparent Weightlessness is around actinguponthem.It actswithalmostthesame horizontal velocity the earth. It theearth. fallswithoutgettingcloser (relative totheearth’s sur- g .” thatthey While itistrue toward

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P M LL41-L50_cp09te_LAB.indd 10 4 1 - L 5 0 _ c p 0 162 Fill cupwithwater. 9 t Fig. B e _ L A

B . i n d d Laboratory ManualLaboratory (Activity 43)

1 0 2. directly over asink.Drop thecupintosink. with water, usingyour fingerasastopperover thehole. Hold thecup Step 3: 6. 5. 4. Analysis 3. masking tapeover theholeonbottomofcup. holes pokedthrough its Step 4:

Whathappenstothewaterascupfalls? Suppose you were standingonabathroom scaleinsideanelevator. Explain whythedraining wateractedasitdidinSteps 3and4. Explain whythewashersactedastheydidinStep 2. Whathappenstothewaterascupfalls? c. b. a. happen toyour weight reading whentheelevator Based inthisactivity, onyour observations predict whatwould e. d. moved upward ataconstantspeed. accelerated downward atanacceleration greater than accelerated downward atanacceleration lessthan moved downward ataconstantspeed. accelerated upward. Repeat Step 3forasecondcuphalffilledwithwater, withtwo Remove bandsfrom thecupandfill the cuphalffull therubber sides (Figure B). You maywishtoplaceapieceof g . g .

© Pearson Education, Inc., or its affiliates. All rights reserved. 44/17/08 12:00:21 PM / 1 7 / 0 8

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