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(III) A fugitive tries to hop on a freight train traveling at a constant speed of 5.0 m/s. Just as an empty box car passes him, the fugitive starts from rest and accelerates at a 4 m/s to his maximum speed of 6.0 m/s, which he then maintains. (a) How long does it take him to catch up to the empty box car? (b) What is the distance traveled to reach the box car?

(III) A fugitive tries to hop on a freight train traveling at a constant speed of 5.0 m/s. Just as an empty box car passes him, the fugitive starts from rest and accelerates at a 4 m/s to his maximum speed of 6.0 m/s, which he then maintains. (a) How long does it take him to catch up to the empty box car? (b) What is the distance traveled to reach the box car?

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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passes the point 1 = 3.00 s. It passes the point x = 385 45.0 m/s at t = 20.0 s. Find (a) the average velocity, d (b) the average acceleration, between t= 3.00 s and 20.0 s. V = 18 m/s nd 2-6 Motion at Constant Acceleration 4 car slows down from 28 m/s to rest in a distance of What was its acceleration, assumed constant? car accelerates from 14 m/s to 21 m/s in 6.0 s. What ts acceleration? How far did it travel in this time? ne constant acceleration. ight plane must reach a speed of 35 m/s for takeoff. ong a runway is needed if the (constant) accelera- Yo 25m13 FIGURE 2-38 Problem 33. 34. (II) A space vehicle accelerates uniformly from 85 m/e at t = 0 to 162 m/s at t = 10.0 s. How far did it move between t = 2.0 s and t = 6.0 s? aseball pitcher throws a baseball with a speed of Estimate the average acceleration of the ball he throwing In throwing II, the pitcher s it through 35. (II) A runner hopes to complete the 10,000-m run in less than 30.0 min. After running at constant speed for exactly 27.0 min, there are still 1200 m to go. The runner must then accelerate at 0.20 m/s for how many seconds in order to achieve the desired time? 3.5 m- 36. (III) A fugitive tries to hop on a freight train traveling at a constant speed of 5.0 m/s. Just as an empty box car passes him, the fugitive starts from rest and accelerates at a 1.4 m/s to his maximum speed of 6.0 m/s, which he then maintains. (a) How long does it take him to catch up to the empty box car? (b) What is the distance traveled to ment of about m behind the point released reach the box car? FIGURE 2-37 Problem 25. 37. (III) Mary and Sally are in a foot race (Fig. 2-39). When Mary is 22 m from the finish line, she has a speed of 4.0 m/s and is 5.0 m behind Sally, who has a speed of 5.0 m/s. Sally thinks she has an easy win and so, during the remaining portion of the race, decelerates at a constant rate of Elass sprinter can reach a top speed (of about ne first 18.0 m of a race. What is the average this sprinter and how long does it take her meed? loration does
Transcribed Image Text:passes the point 1 = 3.00 s. It passes the point x = 385 45.0 m/s at t = 20.0 s. Find (a) the average velocity, d (b) the average acceleration, between t= 3.00 s and 20.0 s. V = 18 m/s nd 2-6 Motion at Constant Acceleration 4 car slows down from 28 m/s to rest in a distance of What was its acceleration, assumed constant? car accelerates from 14 m/s to 21 m/s in 6.0 s. What ts acceleration? How far did it travel in this time? ne constant acceleration. ight plane must reach a speed of 35 m/s for takeoff. ong a runway is needed if the (constant) accelera- Yo 25m13 FIGURE 2-38 Problem 33. 34. (II) A space vehicle accelerates uniformly from 85 m/e at t = 0 to 162 m/s at t = 10.0 s. How far did it move between t = 2.0 s and t = 6.0 s? aseball pitcher throws a baseball with a speed of Estimate the average acceleration of the ball he throwing In throwing II, the pitcher s it through 35. (II) A runner hopes to complete the 10,000-m run in less than 30.0 min. After running at constant speed for exactly 27.0 min, there are still 1200 m to go. The runner must then accelerate at 0.20 m/s for how many seconds in order to achieve the desired time? 3.5 m- 36. (III) A fugitive tries to hop on a freight train traveling at a constant speed of 5.0 m/s. Just as an empty box car passes him, the fugitive starts from rest and accelerates at a 1.4 m/s to his maximum speed of 6.0 m/s, which he then maintains. (a) How long does it take him to catch up to the empty box car? (b) What is the distance traveled to ment of about m behind the point released reach the box car? FIGURE 2-37 Problem 25. 37. (III) Mary and Sally are in a foot race (Fig. 2-39). When Mary is 22 m from the finish line, she has a speed of 4.0 m/s and is 5.0 m behind Sally, who has a speed of 5.0 m/s. Sally thinks she has an easy win and so, during the remaining portion of the race, decelerates at a constant rate of Elass sprinter can reach a top speed (of about ne first 18.0 m of a race. What is the average this sprinter and how long does it take her meed? loration does
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