practicemidterm2

# practicemidterm2 - 1 Inthefigurebelow, a 127Nb.146N c.253N...

This preview shows page 1. Sign up to view the full content.

This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: PracticeMidterm2Physics6AWinter2008 1. Inthefigurebelow,whatisthetensioninropeA? a. 127Nb.146N c.253N d.317N 2. Apersonwithw=600NisridingonaFerrisWheelwithR=20m.The FerrisWheelisrotatingwithacircularspeedofvc=12m/s.Whatisthe normalforcethattheseatexertsonthepersonatthebottomofthecircle? a. 4920N b.440N c.1640N d.1040N 3. Aboxonacarpetonahorizontalsurfacehasacoefficientofstaticfrictions =0.23.Iftheboxhasaweightofw=300N,whathorizontalforcedoyou needtopushittogetittostartmoving? a. 300N b.7.0N c.1304N d.69N 4. SantaBarbaragotafreaksnowstorm,soyouareiceskatingtoclass.You skidtoastoponalevelpatchoficeint=12sfromaninitialspeedofvi=7.5 m/s.Whatwasthecoefficientofkineticfriction,kbetweenyouandtheice? a. 0.064 b.15.7 c.0.16 d.6.12 5. Aspringwithspringconstantk=23.1N/mishungvertically.Ifyouhanga weightofmass5kgfromit,howfardoesthespringstretch? a. 2.12m b.0.216m c.4.62m d.0.476m 6. Youspinaballofmass1.5kgattheendofa35cmlongstringinahorizontal circle.ThestringhastensionT0.Ifyoutriplethecircularvelocityoftheball, whatisthenewtensioninthestring,intermsofT0? a. 3T0 b.9T0 c.(9/2)T0 d.(1/9)T0 7. Ifyouarestandingonthesurfaceoftheearth,whichisgreater:the gravitationalforcethattheearthexertsonyou,orthegravitationalforcethat youexertontheearth? a. TheFgtheearthexertsonyou b.TheFgyouexertontheearth c.Theyarethesame. 8. Youareorbitingtheearthinaspacecraftatavelocityofvc=3km/s.Howfar mustyoubeabovetheearth'ssurface? a. 3.79x107m b.4.43x107mc.1.33x1011md.6.7x105m 9. Thependulumbelowisdrawnatthehighestpointinitsswing,whereitisat a30angletothevertical.Thelengthofthependulumis1.6m,andthemass oftheweightattheendis6kg.Whatisitsvelocityatthelowestpointinits swing? 4.12m/s a.3.96m/sb. 0.66m/s c.2.03m/s d. d.Notenoughinformationtosay 10.Apersonpushingonablockofmass16kgonahorizontalsurface acceleratesitfrom2.0m/sto9.0m/sint=8s.Whatistheaveragepower neededtodothis? a.77W b.616W c.107W d.435W 11. Youareleapinguptoblockaspikeonthevolleyballcourt.Ifyouweigh550 N,andyoupushdownonthefloorwithaforceofF=1000N,whatisyour accelerationup? a. 12.7m/s2 b.27.6m/s2 c.17.8m/s2 d.8.0m/s2 ...
View Full Document

• Winter '07
• STANEK
• Force, Apersonwithw=600NisridingonaFerrisWheelwithR=20m.The FerrisWheelisrotatingwithacircularspeedofvc=12m/s.Whatisthe normalforcethattheseatexertsonthepersonatthebottomofthecircle, b.440N c.1640N d.1040N, b.7.0N c.1304N d.69N, b.0.216m c.4.62m d.0.476m, a.77W b.616W c.107W, a30°angletothevertical.Thelengthofthependulumis1.6m,andthemass oftheweightattheendis6kg.Whatisitsvelocityatthelowestpointinits swing

{[ snackBarMessage ]}

Ask a homework question - tutors are online