...13 ILW You drive on Interstate 10 from San Antonio to Houston, half the time at 55 km/h and the other half at 90 km/h. On the way back you travel half the distance at 55 km/h and the other half at 90 km/h. What is your average speed (a) from San Antonio to Houston, (b) from Houston back to San Antonio, and (c) for the entire trip? (d) What is your average velocity for the entire trip? (e) Sketch x versus t for (a), assuming the motion is all in the positive x direc- tion. Indicate how the average velocity can be found on the sketch. ai A 165 to x rioitiag off Module 2-2 Instantaneous Velocity and Speed m 14 GO An electron moving along the x axis has a position given by x 16tem, where t is in seconds. How far is the electron from the origin when it momentarily stops? = GO 15 Go (a) If a particle's position is given by x = 4 - 12t + 3t² (where t is in seconds and x is in meters), what is its velocity at t = 1 s? (b) Is it moving in the positive or negative direction of x just then? (c) What is its speed just then? (d) Is the speed increasing or decreasing just then? (Try answering the next two questions without further calculation.) (e) Is there ever an instant when the velocity is zero? If so give the time t if not answer no •21 t = 5. const and C 8.00 to 9.0 the a 22 the t ters stan wha From and (g) (k) Mo 23 ent cm
...13 ILW You drive on Interstate 10 from San Antonio to Houston, half the time at 55 km/h and the other half at 90 km/h. On the way back you travel half the distance at 55 km/h and the other half at 90 km/h. What is your average speed (a) from San Antonio to Houston, (b) from Houston back to San Antonio, and (c) for the entire trip? (d) What is your average velocity for the entire trip? (e) Sketch x versus t for (a), assuming the motion is all in the positive x direc- tion. Indicate how the average velocity can be found on the sketch. ai A 165 to x rioitiag off Module 2-2 Instantaneous Velocity and Speed m 14 GO An electron moving along the x axis has a position given by x 16tem, where t is in seconds. How far is the electron from the origin when it momentarily stops? = GO 15 Go (a) If a particle's position is given by x = 4 - 12t + 3t² (where t is in seconds and x is in meters), what is its velocity at t = 1 s? (b) Is it moving in the positive or negative direction of x just then? (c) What is its speed just then? (d) Is the speed increasing or decreasing just then? (Try answering the next two questions without further calculation.) (e) Is there ever an instant when the velocity is zero? If so give the time t if not answer no •21 t = 5. const and C 8.00 to 9.0 the a 22 the t ters stan wha From and (g) (k) Mo 23 ent cm
Physics for Scientists and Engineers, Technology Update (No access codes included)
9th Edition
ISBN:9781305116399
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter2: Motion In One Dimension
Section: Chapter Questions
Problem 2.11P: A hare and a tortoise compete in a race over a straight course 1.00 km long. The tortoise crawls at...
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