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Pike Vo teo Bike J. d e d Car Postin w/time Xcar (t) = 3vot Car SV t-T Car position Time Xcar (+) = 3vo (ET) Find when Meet-up Car 3√ Problem 3 Bive Position with time X bike (+) = Vot Xcar (t) = Xorke (€) 3vo (t-7)= Vo € 3v0 € -3vo T -3 vot -31T - Vot 3uot = -2% = looking for £ -2 Vo T= € -2 Vo Position (x) ° 2 3 ५ ()tame Fall 2023 Physics 20: General Physics I Homework 1 Problems 1-2: Wednesday August 21 Problems 3-7: Friday August 23 Problem 1 Parking Lot Walk You park your car in the COS parking lot and then walk to class which is a distance d away. (a) If you walk at speed vo and make it to class exactly on time, how much time were you walking for? (b) Suppose Andres saw you when you got out of the car and talked to you for one-third of the time you found in the previous part. How many times faster (than vo) do you need to walk now to still make it to class exactly on time? Problem 2 Commute Suppose you live a distance 9d away from COS and decide to run to campus from home. For the first third of the distance you run as fast as you can, but then get tired. You then walk for half of the total distance before running again to the end. (a) Sketch a motion diagram for the entire trip. (b) Let the origin, x = 0, be when you first get tired. What is the position of your home and campus? What is the position when you start running again? Label these positions (including the origin) on your motion diagram. (c) If you run at speed vo and walk at speedo, what was your average speed over the entire commute? Problem 3 Bike and Car 3 Suppose I ride my bike at a constant speed up and you drive your car at a constant speed 3v0. (a) We both head north on Mooney from the same point, however you leave a time T after me. How far along the road will you have driven when you catch me? (ANSWER: T). (b) Sketch a single position plot with both the bike and car on it. 2

Pike Vo teo Bike J. d e d Car Postin w/time Xcar (t) = 3vot Car SV t-T Car position Time Xcar (+) = 3vo (ET) Find when Meet-up Car 3√ Problem 3 Bive Position with time X bike (+) = Vot Xcar (t) = Xorke (€) 3vo (t-7)= Vo € 3v0 € -3vo T -3 vot -31T - Vot 3uot = -2% = looking for £ -2 Vo T= € -2 Vo Position (x) ° 2 3 ५ ()tame Fall 2023 Physics 20: General Physics I Homework 1 Problems 1-2: Wednesday August 21 Problems 3-7: Friday August 23 Problem 1 Parking Lot Walk You park your car in the COS parking lot and then walk to class which is a distance d away. (a) If you walk at speed vo and make it to class exactly on time, how much time were you walking for? (b) Suppose Andres saw you when you got out of the car and talked to you for one-third of the time you found in the previous part. How many times faster (than vo) do you need to walk now to still make it to class exactly on time? Problem 2 Commute Suppose you live a distance 9d away from COS and decide to run to campus from home. For the first third of the distance you run as fast as you can, but then get tired. You then walk for half of the total distance before running again to the end. (a) Sketch a motion diagram for the entire trip. (b) Let the origin, x = 0, be when you first get tired. What is the position of your home and campus? What is the position when you start running again? Label these positions (including the origin) on your motion diagram. (c) If you run at speed vo and walk at speedo, what was your average speed over the entire commute? Problem 3 Bike and Car 3 Suppose I ride my bike at a constant speed up and you drive your car at a constant speed 3v0. (a) We both head north on Mooney from the same point, however you leave a time T after me. How far along the road will you have driven when you catch me? (ANSWER: T). (b) Sketch a single position plot with both the bike and car on it. 2

Physics for Scientists and Engineers: Foundations and Connections
Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter39: Relativity
Section: Chapter Questions
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I am stuck on question 3 b on drawing position plot.
Pike Vo teo Bike J. d e d Car Postin w/time Xcar (t) = 3vot Car SV t-T Car position Time Xcar (+) = 3vo (ET) Find when Meet-up Car 3√ Problem 3 Bive Position with time X bike (+) = Vot Xcar (t) = Xorke (€) 3vo (t-7)= Vo € 3v0 € -3vo T -3 vot -31T - Vot 3uot = -2% = looking for £ -2 Vo T= € -2 Vo Position (x) ° 2 3 ५ ()tame
Transcribed Image Text:Pike Vo teo Bike J. d e d Car Postin w/time Xcar (t) = 3vot Car SV t-T Car position Time Xcar (+) = 3vo (ET) Find when Meet-up Car 3√ Problem 3 Bive Position with time X bike (+) = Vot Xcar (t) = Xorke (€) 3vo (t-7)= Vo € 3v0 € -3vo T -3 vot -31T - Vot 3uot = -2% = looking for £ -2 Vo T= € -2 Vo Position (x) ° 2 3 ५ ()tame
Fall 2023 Physics 20: General Physics I Homework 1 Problems 1-2: Wednesday August 21 Problems 3-7: Friday August 23 Problem 1 Parking Lot Walk You park your car in the COS parking lot and then walk to class which is a distance d away. (a) If you walk at speed vo and make it to class exactly on time, how much time were you walking for? (b) Suppose Andres saw you when you got out of the car and talked to you for one-third of the time you found in the previous part. How many times faster (than vo) do you need to walk now to still make it to class exactly on time? Problem 2 Commute Suppose you live a distance 9d away from COS and decide to run to campus from home. For the first third of the distance you run as fast as you can, but then get tired. You then walk for half of the total distance before running again to the end. (a) Sketch a motion diagram for the entire trip. (b) Let the origin, x = 0, be when you first get tired. What is the position of your home and campus? What is the position when you start running again? Label these positions (including the origin) on your motion diagram. (c) If you run at speed vo and walk at speedo, what was your average speed over the entire commute? Problem 3 Bike and Car 3 Suppose I ride my bike at a constant speed up and you drive your car at a constant speed 3v0. (a) We both head north on Mooney from the same point, however you leave a time T after me. How far along the road will you have driven when you catch me? (ANSWER: T). (b) Sketch a single position plot with both the bike and car on it. 2
Transcribed Image Text:Fall 2023 Physics 20: General Physics I Homework 1 Problems 1-2: Wednesday August 21 Problems 3-7: Friday August 23 Problem 1 Parking Lot Walk You park your car in the COS parking lot and then walk to class which is a distance d away. (a) If you walk at speed vo and make it to class exactly on time, how much time were you walking for? (b) Suppose Andres saw you when you got out of the car and talked to you for one-third of the time you found in the previous part. How many times faster (than vo) do you need to walk now to still make it to class exactly on time? Problem 2 Commute Suppose you live a distance 9d away from COS and decide to run to campus from home. For the first third of the distance you run as fast as you can, but then get tired. You then walk for half of the total distance before running again to the end. (a) Sketch a motion diagram for the entire trip. (b) Let the origin, x = 0, be when you first get tired. What is the position of your home and campus? What is the position when you start running again? Label these positions (including the origin) on your motion diagram. (c) If you run at speed vo and walk at speedo, what was your average speed over the entire commute? Problem 3 Bike and Car 3 Suppose I ride my bike at a constant speed up and you drive your car at a constant speed 3v0. (a) We both head north on Mooney from the same point, however you leave a time T after me. How far along the road will you have driven when you catch me? (ANSWER: T). (b) Sketch a single position plot with both the bike and car on it. 2
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