# Gravitational Potential Energy

Topics: Potential energy, Mass, Energy Pages: 10 (1770 words) Published: April 29, 2011
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Physics standard level PaPer 1 Monday 16 November 2009 (afternoon) 45 minutes INSTRUCTIONS TO CANDIDATES • Do not open this examination paper until instructed to do so. • Answer all the questions. • For each question, choose the answer you consider to be the best and indicate your choice

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16 pages © International Baccalaureate Organization 2009

2– 1.

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Thetimeelapsedsincethebeginningoftheuniverseisoftheorderof A. B. C. D. 108s. 1018s. 1028s. 1038s.

2.

In an experiment to measure the acceleration of free fallatthesurfaceoftheEarth the following resultswere obtained. Acceleration of free fall / m s–2 7.69 7.70 7.69 7.68 7.70

Theresultsare A. B. C. D. accurateandprecise. inaccuratebutprecise. accuratebutimprecise. inaccurateandimprecise.

3.

Twoballsofdifferentmassaredroppedfromthetopofatallbuildingoneaftertheother.Thedistance betweentheballs A. B. C. D. increaseswithtime. dependsontheinitialvelocityonly. remainsconstant. dependsonthemassoftheballs.

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3– 4.

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Thegraphshowshowthevelocityofaparticlevarieswithtime. velocity

0

time

Which of the following graphs correctly shows how the acceleration of the particle varies withtime? A. acceleration B. acceleration

0

time

0

time

C.

acceleration

D.

acceleration

0

time

0

time

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4– 5.

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An aircraft is flying at constant speed in a horizontal circle. Which of the following diagrams bestillustratestheforcesactingonthe aircraftintheverticalplane? A. B.

C.

D.

6.

Foraparticlemovingatconstantspeedinahorizontalcircle,theworkdonebythecentripetalforce is A. B. C. D. zero. directlyproportionaltotheparticlemass. directlyproportionaltotheparticlespeed. directlyproportionaltothe(particlespeed)2.

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5– 7.

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Avehicleisdrivenupahillatconstantspeed.Whichofthefollowingbestdescribestheenergy changesinvolved? A. B. C. D. Chemicalenergyisconvertedintogravitationalpotentialenergy. Chemicalenergyisconvertedintogravitationalpotentialenergy,soundandthermalenergy. Gravitationalpotentialenergyisconvertedintochemicalenergy. Gravitationalpotentialenergyisconvertedintochemicalenergy,soundandthermalenergy.

8.

Arubberball,travellinginahorizontaldirection,strikesaverticalwall.Itreboundsatrightangles tothewall.Thegraphbelowillustratesthevariationoftheball’smomentumpwithtimetwhenthe ballisincontactwiththewall. p

0

t

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6– 9.

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In the table below, which row shows the correct conversion between the Kelvin and Celsius temperaturescales? Kelvin temperature / K A. B. C. D. 0 100 173 373 Celsius temperature / oC 373 –173 100 –100

10. Carbonhasarelativeatomicmassof12andoxygenhasarelativeatomicmassof16.Asampleof 6gofcarbonhastwiceasmanyatomsas A. B. C. D. 32gofoxygen. 8gofoxygen. 4gofoxygen. 3gofoxygen.

11. Tanya heats 100g of a liquid with an electric heater which has a constant power output of...