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This is a GENERAL PHYSICS SUBJECT ONLY!!!! Answer the questions 1,2,3 with complete answer and solutions

This is a GENERAL PHYSICS SUBJECT ONLY!!!! Answer the questions 1,2,3 with complete answer and solutions

Glencoe Physics: Principles and Problems, Student Edition
Glencoe Physics: Principles and Problems, Student Edition
1st Edition
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Paul W. Zitzewitz
Chapter2: Representing Motion
Section2.4: How Fast?
Problem 42SSC
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This is a GENERAL PHYSICS SUBJECT ONLY!!!! Answer the questions 1,2,3 with complete answer and solutions
Sample Problem 3.5 A uniformly accelerated car takes 5.0 s to cover 250 m and another 3.0 s to cover the next 250 m. Find the acceleration of the car. 1. 3. 250 m = vox (5.0 s) + 2. t = 5.0 s 250 m Dividing by 5.0 s and solving for Vox, Vox 50 m/s-(2.5 s)a.. Practice Exercises 3.5 Solution: Using Eq. (3.4) for motion along the x-axis, and substituting values for the first 250 m, x=v0xt+ √²+1=129²₂²² 4, (5.0 s)². Dividing by 8.0 s and solving for vox Vox = 62.5 m/s-(4.0 s)a.. (1) For the total 500 m, the total time is 8.0 s. Using Eq. (3.4) and substituting values for the total 500 m, 1 x=v0xt+ 500 m = vox (8.0 s) +-a (8.0 s)². B (2) Since Vox is the same for both (1) and (2), we equate (1) and (2) to get the acceleration a Vox = Vox 50 m/s-(2.5 s)a, = 62.5 m/s-(4.0 s)ax t = 3.0 s 250 m 2 ax = 8.3 m/s² Angelito is driving at 6.0 m/s when a traffic enforcer signals that he should speed up. He then steps on the gas pedal and accelerated uniformly to a speed of 15 m/s in 4.5 s. Find the total distance Angelito traveled. Assume Angelito's reaction time is 0.15 s. At the instant the traffic light goes green, a car waiting at the intersection starts ahead with an acceleration of 2.5 m/s²2. At the same instant, a bus coming from behind moving at 12.0 m/s passes the car. When and where will the car catch up with the bus? How many seconds will it take the car in Sample Problem 3.5 to cover the next 250 m?
Transcribed Image Text:Sample Problem 3.5 A uniformly accelerated car takes 5.0 s to cover 250 m and another 3.0 s to cover the next 250 m. Find the acceleration of the car. 1. 3. 250 m = vox (5.0 s) + 2. t = 5.0 s 250 m Dividing by 5.0 s and solving for Vox, Vox 50 m/s-(2.5 s)a.. Practice Exercises 3.5 Solution: Using Eq. (3.4) for motion along the x-axis, and substituting values for the first 250 m, x=v0xt+ √²+1=129²₂²² 4, (5.0 s)². Dividing by 8.0 s and solving for vox Vox = 62.5 m/s-(4.0 s)a.. (1) For the total 500 m, the total time is 8.0 s. Using Eq. (3.4) and substituting values for the total 500 m, 1 x=v0xt+ 500 m = vox (8.0 s) +-a (8.0 s)². B (2) Since Vox is the same for both (1) and (2), we equate (1) and (2) to get the acceleration a Vox = Vox 50 m/s-(2.5 s)a, = 62.5 m/s-(4.0 s)ax t = 3.0 s 250 m 2 ax = 8.3 m/s² Angelito is driving at 6.0 m/s when a traffic enforcer signals that he should speed up. He then steps on the gas pedal and accelerated uniformly to a speed of 15 m/s in 4.5 s. Find the total distance Angelito traveled. Assume Angelito's reaction time is 0.15 s. At the instant the traffic light goes green, a car waiting at the intersection starts ahead with an acceleration of 2.5 m/s²2. At the same instant, a bus coming from behind moving at 12.0 m/s passes the car. When and where will the car catch up with the bus? How many seconds will it take the car in Sample Problem 3.5 to cover the next 250 m?
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