20 Roller
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 Wisdom Luggage 40 Rolling Wheeled Black 1200 Denier Duffel Bag with Pull Handle  US $36.01
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 Gran Tourister 3 Pc TSA Hardside Rolling Spinner Carry ON Suitcase Luggage $690 US $169.99
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 American Tourister 8 piece Luggage Set BLACK US $11.00
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 Brighton Ruby Black Side Wheeler Duffel Luggage Suitcase Bag US $107.50
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 American Tourister clean 2 peice hard and soft luggage set with wheels US $55.00
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 A HEAVY DUTY ROLLING TROLLEY THAT WILL WITH STAND ANY TYPE OF HANDLING US $59.95
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 Hartmann 20 Expandable Hard Case Spinner US $75.00
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 StanSport TRANSPORT I Rolling Luggage Bag Brand New US $32.86
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 Gran Tourister 3 Pc TSA Hardside Rolling Spinner Carry ON Suitcase Luggage $645 US $169.99
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 Quality Berries20 Polka Dot Luggage Case Baggage Trolley Roller case travel bag US $.01
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 TOP Quality Mickey Mouse Trolley Travel Luggage Bag Roller Baggage 2PC KIT Set US $.01
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 NEW DUCATI TUMI 20 T3 WHEELED ROLLER BAG 6520 MotoGP Limited Ed Tags Locks US $485.00
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 GUESS Overnight Dome Bag Travel Natural Moose Signs suit case Logo Carry On NWT US $94.99
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 MEZZI HARD ROLLER CASE TRAVEL BLACK AIRLINE APPROVED US $59.99
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 Gran Tourister 3 Pc TSA Hardside Rolling Spinner Trolley Suitcase Luggage $645BL US $169.99
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 MEZZI HARD ROLLER TRAVEL SILVER CASE AIRLINE APPROVED US $59.99
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 Samantha Brown Croco 21 Upright Black Camel FREE TOTE Luggage Wheeled US $62.51
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 20 Leopard Luggage Case Baggage Trolley Roller US $138.99
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 Dora the Explorer Go Diego Go Kids Blue Luggage Suitcase Travel Roller Bag US $29.99
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 Cosmos Luggage on Wheels Navy Blue US $33.00
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 Disney Toys Story Kids Black Luggage Suitcase Woody Buzz Travel Roller Bag US $29.99
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 Gran Tourister 3 Pc TSA Hardside Rolling Spinner Trolley Suitcase Luggage Set US $169.99
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 Dakine SPLIT ROLLER SM suitcase US $175.00
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 FILSON 290 WHEELED CARRY ON BAG BROWN NEW US $475.00
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 FILSON 290 WHEELED CARRY ON BAG OTTER GREEN NEW US $475.00
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 SAMANTHA BROWN 21 UPRIGHT TOTE LUGGAGE SUITCASE CARRYON ROLLER WHEELED NAVY US $89.99
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 Case Logic 26 XN Rolling Upright Black US $159.99
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 NEW Travelers Choice SIENNA Travel Luggage Case Rolle US $87.99
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 NEW Travelers Choice TC Luggage Sienna 21 Hybrid Expa US $87.99
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 Disney Pixar Cars Kids Blue Luggage Suitcase McQueen Travel Roller Bag US $29.99
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 E volve air cabin Travel Trolley backpack rucksack US $48.99
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 Dakine Mens Carry On Roller Luggage OSFA Phantom US $92.98
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 DAKINE CARRY ON ROLLER BLACK BRAND NEW US $84.00
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 FILSON 248 OT LARGE TRAVEL BAG OTTER GREEN NEW US $325.00
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 DaKine Carry On Roller Luggage Fremont US $124.99
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 Joy Mangano TravelEase Light 22 DRESSER LUGGAGE CARRY ON ROLLER WHEELED OLIVE US $59.99
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 Joy Mangano TravelEase Light 22 DRESSER LUGGAGE CARRY ON ROLLER WHEELED GRAY US $59.99
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 SAMANTHA BROWN 2 PC LIGHTWEIGHT ROLLER LUGGAGE SUITCASE CARRY ON TOTE RED US $41.00
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 Netpack 20 Carry Light Roller Duffel Navy US $79.99
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 NEW Samsonite Silhouette 12 43380 1782 Travel Luggage C US $224.99
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 NEW Samsonite Pro 3 42463 1070 Travel Luggage Case Rol US $377.99
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 Netpack 20 Carry Light Roller Duffel Black US $79.99
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 8300 268 Carry On Roller US $118.00
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 2Pc OCEANA TSA Hardside Rolling Spinner Trolley Luggage Sets 28 20 Silver Set US $149.99
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 Gran Tourister 2Pc TSA Hardside Rolling Spinner Trolley Suitcase Luggage 28 20 US $149.99
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 New 20 NETPACK Lit On Board Carry On Luggage US $87.99
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 New 2 Pieces Upright Rolling Luggage Set Suitcase US $59.00
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 Hello Kitty 20 Luggage Trolley Roller Carry On Diamond Check Quilt Face Pink US $104.95
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 Hello Kitty 20 Luggage Trolley Roller Carry On Diamond Check Quilt Face Black US $104.95
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 American Tourister Carry On BLACK Nylon Shoulder Bag Weekender Luggage Rider New US $29.99
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 New Mens Womens Dakine CARRY ON Roller Luggage Travel bag Black 36L US $84.00
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 Gran Tourister 20 Carry On TSA Hardside Rolling Spinner Trolley Luggage $225BL US $89.99
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 Gran Tourister 20 TSA Hardside Rolling Spinner Carry ON Suitcase Luggage $225SL US $89.99
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 FILSON 290 WHEELED CARRY ON BAG TAN BRAND NEW US $475.00
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 International Traveller London Range 20 Wheeled Cabin Roller Luggage Carry On US $73.94
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 Antler Transair 20 Small Rolling Duffel Bag Black US $99.99
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 New PIEL Genuine leather duffel bag US $412.00
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 New PIEL Genuine leather wheeled traveler US $416.00
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 New PIEL Genuine leather office computer Bag US $418.00
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 New PIEL Genuine leather computer bag US $418.00
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 New PIEL Genuine leather 19 multi pocket wheeler bag US $422.00
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 New PIEL Genuine leather Vertical office on wheels US $430.00
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 New PIEL Genuine leather small laptop backpack US $430.00
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 New PIEL Genuine leather 22 wheeled traveler bag US $432.00
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 New Piel Genuine leather Multi pocket duffle on wheels US $438.00
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 New Piel Genuine leather Executive wheeled traveler with zip US $438.00
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 NEW Samsonite Pixelcube 36977 1919 Travel Luggage Case US $260.99
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 NEW Samsonite Pixelcube 36977 1009 Travel Luggage Case US $260.99
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 NEW Samsonite Pixelcube 36977 1173 Travel Luggage Case US $260.99
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 TUMI BROWN NYLON BAGBLACK TRIM BACKPACK SUITCASEBP STRAPSSHOULDERLUGGAGE US $79.00
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 Targus Notebook Case US $72.18
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 Targus Rolling Notebook Case US $59.99
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 Targus Corporate Traveler Vertical Roller Case US $135.94
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 511 Tactical 56038 DC Roller US $169.99
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 Millennium 3 Piece Luggage Set With Two Duffel Bags and Roller Wheeled Bag US $59.99
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 Auburn Blue Orange 3 PC Set of Rolling Luggage NEW US $129.99
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 FILSON 248 TN LARGE TRAVEL BAG DARK TAN NEW US $325.00
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 NEW Samsonite Silhouette 12 433861267 Travel Luggage Ca US $260.99
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 HAWAII TRAVEL BAG WITH WHEELS US $10.99
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 American Tourister 2 piece Luggage Set Roller Bag Handle Carry On Shoulder Bag US $40.00
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finding a located speed of a roller coaster?
Given a roller coaster train with a mass of 500 kg going downhill. Suppose that when it is 23 meters high its speed is 20 m/s. Find its speed when its height is 9 meters.
Hint: Use the Conservation of Mechanical Energy. Its total energy at 23m is the same as its total energy at 9m.
Be sure to show your work.
KE(1) + PE(1) = KE(2) + PE(2)
(1/2)(mv^2) + mgh = (1/2)(mv^2) + mgh
(1/2)v^2 + gh = (1/2)v^2 + gh
(1/2)(20 m/s)^2 + (9.8 m/s^2)(23 m) = (1/2)v^2 + (9.8 m/s^2)(9 m)
200 m^2/s^2 + 225.4 m^2/s^2 = (1/2)v^2 + 88.2 m^2/s^2
337.2 m^2/s^2 = (1/2)v^2
674.4 m^2/s^2 = v^2
v = 26 m/s (approximately)
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