Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
4th Edition
ISBN: 9780133942651
Author: Randall D. Knight (Professor Emeritus)
Publisher: PEARSON
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Textbook Question
Chapter 1, Problem 4EAP
a. Write a paragraph describing the particle model. What is it, and why is it important?
b. Give two examples of situations, different from those described in the text, for which the particle model is appropriate.
c. Give an example of a situation, different from those described in the text, for which it would be inappropriate.
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1. If the force vector shown below has x, y, andz
components of 300 N, 400 N and 800 N,
respectively,
a. Write it in vector form
I.
b. Then determine the scalar component of the
force in the direction defined by, u=
0.250i+ 0.968j
Which of the following is an accurate statement about vectors?
O A. Even though two vectors have unequal magnitudes, it is possible that their vector sum is zero.
O B. Rotating a vector about an axis passing through the tip of the vector does not change the vector.
OC.I t is possible to add a scalar quantity to a vector.
OD. The magnitude of a vector is positive even if all of its components are negative.
O E. The magnitude of a vector can be zero even though one of its components is not zero.
1. Is it possible that the magnitude of the speed is also the magnitude of the velocity? Explain your answer.
2. A man walked from point A to F following the route in the grid below in 250 seconds. Determine:
F
B.
0.5 km
a. the average speed in m/s
b. the magnitude of the displacement
c. the magnitude of the average velocity.
E.
A.
Chapter 1 Solutions
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
Ch. 1 - How many significant figures does each of the...Ch. 1 - How many significant figures does each of the...Ch. 1 - Is the particle in FIGURE Q1.3 speeding up?...Ch. 1 - Does the object represented in FIGURE Q1.4 have a...Ch. 1 - Does the object represented in FIGURE Q1.5 have a...Ch. 1 - Determine the signs (positive, negative, or zero)...Ch. 1 - Determine the signs (positive, negative, or zero)...Ch. 1 - Determine the signs (positive, negative, or zero)...Ch. 1 - A car skids to a halt to avoid hitting an object...Ch. 1 - Prob. 2EAP
Ch. 1 - You are watching a jet ski race. A racer speeds up...Ch. 1 - a. Write a paragraph describing the particle...Ch. 1 - You drop a soccer ball from your third-story...Ch. 1 - A baseball player starts running to the left to...Ch. 1 - A softball player slides into second base. Use the...Ch. 1 - a. FIGURE EX1.8 shows the first three points of a...Ch. 1 - FIGURE EX1.9 shows five points of a motion...Ch. 1 - FIGURE EX1.10 shows two dots of a motion diagram...Ch. 1 - FIGURE EX1.11 shows two dots of a motion diagram...Ch. 1 - A speed skater accelerates from rest and then...Ch. 1 - A car travels to the left at a steady speed for a...Ch. 1 - A goose flies toward a pond. It lands on the water...Ch. 1 - You use a long rubber band to launch a paper wad...Ch. 1 - A roof tile falls straight down from a two-story...Ch. 1 - Your roommate drops a tennis ball from a...Ch. 1 - 18. FIGURE EX1.18 shows the motion diagram of a...Ch. 1 - Prob. 19EAPCh. 1 - Prob. 20EAPCh. 1 - Draw a pictorial representation for the following...Ch. 1 - Draw a pictorial representation for the following...Ch. 1 - How many significant figures are there in the...Ch. 1 - Convert the following to SI units: a. 8.0 in b. 66...Ch. 1 - Convert the following to SI units: a. 75 in b....Ch. 1 - Using the approximate conversion factors in Table...Ch. 1 - Using the approximate conversion factors in Table...Ch. 1 - Prob. 28EAPCh. 1 - Prob. 29EAPCh. 1 - Prob. 30EAPCh. 1 - Estimate the height of a telephone pole. Give your...Ch. 1 - Estimate the average speed with which the hair on...Ch. 1 - Motor neurons in mammals transmit signals from the...Ch. 1 - For Problems 34 through 43, draw a complete...Ch. 1 - For Problems 34 through 43, draw a complete...Ch. 1 - For Problems 34 through 43, draw a complete...Ch. 1 - For Problems 34 through 43, draw a complete...Ch. 1 - For Problems 34 through 43, draw a complete...Ch. 1 -
For Problems 34 through 43, draw a complete...Ch. 1 - For Problems 34 through 43, draw a complete...Ch. 1 - For Problems 34 through 43, draw a complete...Ch. 1 - For Problems 34 through 43, draw a complete...Ch. 1 - For Problems 34 through 43, draw a complete...Ch. 1 - Problems 44 through 48 show a motion diagram. For...Ch. 1 - Problems 44 through 48 show a motion diagram. For...Ch. 1 - Problems 44 through 48 show a motion diagram. For...Ch. 1 - Problems 44 through 48 show a motion diagram. For...Ch. 1 - Problems 44 through 48 show a motion diagram. For...Ch. 1 - Problems 49 through 52 show a partial motion...Ch. 1 - Problems 49 through 52 show a partial motion...Ch. 1 - Problems 49 through 52 show a partial motion...Ch. 1 - Problems 49 through 52 show a partial motion...Ch. 1 - Prob. 53EAPCh. 1 - As an architect, you are designing a new house. A...Ch. 1 - 55. A 5.4-cm-diameter cylinder has a length of...Ch. 1 - An intravenous saline drip has 9.0 g of sodium...Ch. 1 - Prob. 57EAPCh. 1 - FIGURE P1.58 shows a motion diagram of a car...Ch. 1 - Write a short description of a real object for...Ch. 1 - Write a short description of a real object for...
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- After a ball rolls off the edge of a horizontal table at time t = 0, its velocity as a function of time is given by v=1.2i9.8tj where v is in meters per second and t is in seconds. The balls displacement away from the edge of the table, during the time interval of 0.380 s for which the ball is in flight, is given by r=00.3803vdt To perform the integral, you can use the calculus theorem [A+Bf(x)]dx=Adx+Bf(x)dx You can think of the units and unit vectors as constants, represented by A and B. Perform the integration to calculate the displacement of the ball from the edge of the table at 0.380 s.arrow_forward1. Considering a unit vector u4 = A / A, which of the following are properties of u,? (circle all correct responses) a. u, has the same units as A b. ил1 c. u, points in the same direction as A d. uA < A e. u, is unitless 2. Considering two force vectors F1 = Fii+ Fj+ F1,k and F2 = F2i+ Fj + F2,k with their unit vectors ui = F1 / F; = (u1x) i+ (u1) j+ (u12) k and uz = F2 /F2= (u2) i+ (uz) j+(uz:), which of the following are valid calculations for the resultant force FR=F1+ F;? (circle all correct responses) a. FR = (Fix+ F2)i+(Fiy+ F2) j+(Fiz+ F2) k b. FR = (F1 + F:) [(uix+ u2x)i+(uiy + u2) j+ (uiz + u2) k] c. FR = (F? + F?)0S [(u!x+ u2) i+ (uiy + uz) j+ (uiz + u2:) k] d. FR = (F1uix+ Fru2x)i+ (F1u1y+Fruz»)j+(F1u1:+ F2uz)k %3D 3. Consider two vectors A and B with unit vectors u4 = A/ A and ug = B / B and angle between A and B is 0. Which of the following are correct with regard to dot products? (circle all correct responses) a. A-B is a scalar b. A·B is a vector c. If A and B are…arrow_forward8. You walk 100 m towards North, then 100 m 40 degrees North of East, and you then proceeded for another 100 m at 60 degrees DS of west. a. Sketch the given vectors using head-to-tail method. b. Solve for the magnitude and direction of the resultant vector.arrow_forward
- 1) A displacement vector is 21 km in length and is directed 60 degrees S of E. Which of the following is TRUE? A. Its x- and y- components are 11 km and 10 km, respectively. B. Its x- and y- components are both 10 km. C. Its x- and y- components are 10 km and 11 km, respectively. D. Its x- and y- components are both 11 km. 2) A student adds two velocity vectors with magnitudes of 2.5 km/h and 4.9 km. Which one of the following is TRUE concerning the magnitude of the resultant velocity? A. It must be 5.5 km B. It must be 7.4 km C. It could be equal to zero kilometers, depending on how the vectors are oriented. D. No conclusion can be reached without knowing the directions of the vectors.arrow_forwardIf a vector has components Ax > 0, and Ay < 0, then the angle that this vector makes with the positive x-axis must be in the rangea.) 0° to 90°.b.) 90° to 180°.c.) 180° to 270°.d.) 270° to 360°.e.) It cannot be determined without additional information.arrow_forward1. Give a real world example of the following. A. Something that can be modeled as a vector. B. Something that can be modeled as a scaler.arrow_forward
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