Physics
7th Edition
ISBN: 9780321733627
Author: Douglas C. Giancoli
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 4, Problem 1MCQ
A truck is traveling horizontally to the right (Fig. 4-38). When the truck starts to slow down, the crate on the (frictionless) truck bed starts to slide. In what direction could the net force be on the crate?
- No direction. The net force is zero.
- Straight down (because of gravity).
- Straight up (the normal force).
- Horizontal and to the right.
- Horizontal and to the left.
Figure 4-38
MisConceptual Question 1.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
2) A 400-N block is dragged along a horizontal surface by an applied force F as shown. The coefficient of
kinetic friction is uk = 0.4 and the block moves at constant velocity. The magnitude of F is:
(3/5) F
(4/5) F
A) 100 N
B) 150 N
C) 200 N
D) 290 N
E) 400 N
3-34. Romeo tries to reach Juliet by climbing with
constant velocity up a rope which is knotted at point A. Any
of the three segments of the rope can sustain a maximum
force of 2 kN before it breaks. Determine if Romeo, who has
a mass of 65 kg, can climb the rope, and if so, can he along
with his Juliet, who has a mass of 60 kg, climb down with
constant velocity?
B
60°
A
2-91. Two forces act on the hook. Determine the
magnitude of the projection of F, along F1.
F= 600 N
45
60
120
F2 = [120i + 90j - 0k]N
Chapter 4 Solutions
Physics
Ch. 4 - A 150-kg football player collides head-on with a...Ch. 4 - A line by the poet T. S. Eliot (from Murder in the...Ch. 4 - Why does a child in a wagon seem to fall backward...Ch. 4 - A box rests on the (frictionless) bed of a truck....Ch. 4 - Prob. 3QCh. 4 - If the acceleration of an object is zero, are no...Ch. 4 - Prob. 5QCh. 4 - Prob. 6QCh. 4 - Prob. 7QCh. 4 - (a) Why do you push down harder on the pedals of a...
Ch. 4 - A stone hangs by a fine thread from the ceiling,...Ch. 4 - Prob. 10QCh. 4 - Prob. 11QCh. 4 - Prob. 12QCh. 4 - Prob. 13QCh. 4 - Prob. 14QCh. 4 - Prob. 15QCh. 4 - Prob. 16QCh. 4 - Prob. 17QCh. 4 - Prob. 18QCh. 4 - Prob. 19QCh. 4 - A block is given a brief push so that it slides up...Ch. 4 - Prob. 21QCh. 4 - Prob. 22QCh. 4 - A truck is traveling horizontally to the right...Ch. 4 - You are trying to push your stalled car. Although...Ch. 4 - Matt, in the foreground of Fig. 4-39, is able to...Ch. 4 - A bear sling, Fig. 4-40, is used in some national...Ch. 4 - What causes the boat in Fig. 4-41 to move forward?...Ch. 4 - A person stands on a scale in an elevator. His...Ch. 4 - When a skier skis down a hill, the normal force...Ch. 4 - A golf ball is hit with a golf club. While the...Ch. 4 - Suppose an object is accelerated by a force of 100...Ch. 4 - You are pushing a heavy box across a rough floor....Ch. 4 - Prob. 11MCQCh. 4 - The normal force on an extreme skier descending a...Ch. 4 - To pull an old stump out of the ground, you and a...Ch. 4 - What force is needed to accelerate a sled (mass =...Ch. 4 - Prob. 2PCh. 4 - How much tension must a rope withstand if it is...Ch. 4 - According to a simplified model of a mammalian...Ch. 4 - Superman must stop a 120-km/h train in 150 m to...Ch. 4 - A person has a reasonable chance of surviving an...Ch. 4 - What average force is required to stop a 950-kg...Ch. 4 - Prob. 8PCh. 4 - Prob. 9PCh. 4 - Prob. 10PCh. 4 - Prob. 11PCh. 4 - Prob. 12PCh. 4 - Prob. 13PCh. 4 - Prob. 14PCh. 4 - Prob. 15PCh. 4 - Prob. 16PCh. 4 - Prob. 17PCh. 4 - Prob. 18PCh. 4 - Prob. 19PCh. 4 - A box weighing 77.0 N rests on a table. A rope...Ch. 4 - Figure 4-46
Problem 21.
21. (I) Draw the free-body...Ch. 4 - Prob. 22PCh. 4 - Arlene is to walk across a “high wire" strung...Ch. 4 - A window washer pulls herself upward using the...Ch. 4 - One 3.2-kg paint bucket is hanging by a massless...Ch. 4 - Prob. 26PCh. 4 - A train locomotive is pulling two cars of the same...Ch. 4 - Prob. 28PCh. 4 - At the instant a race began, a 65-kg sprinter...Ch. 4 - A 27-kg chandelier hangs from a ceiling on a...Ch. 4 - Prob. 31PCh. 4 - Figure 4-53 [shows a block (mass mA) on a smooth...Ch. 4 - Prob. 33PCh. 4 - Prob. 34PCh. 4 - 35. (Ill) Suppose the pulley in Fig. 4-55 is...Ch. 4 - Prob. 36PCh. 4 - A force of 35.0 N is required to start a 6.0-kg...Ch. 4 - Prob. 38PCh. 4 - Prob. 39PCh. 4 - Prob. 40PCh. 4 - Prob. 41PCh. 4 - A box is given a push so that it slides across the...Ch. 4 - Prob. 43PCh. 4 - Prob. 44PCh. 4 - Prob. 45PCh. 4 - 46. (II) For the system of Fig. 4-32 (Example...Ch. 4 - Prob. 47PCh. 4 - Prob. 48PCh. 4 - Prob. 49PCh. 4 - A person pushes a 14.0-kg lawn mower at constant...Ch. 4 - Prob. 51PCh. 4 - (a) A box sits at rest on a rough 33° inclined...Ch. 4 - Prob. 53PCh. 4 - Prob. 54PCh. 4 - Prob. 55PCh. 4 - A 25.0-kg box is released on a 27° incline and...Ch. 4 - Prob. 57PCh. 4 - Prob. 58PCh. 4 - The crate shown in Fig. 4-60 lies on a plane...Ch. 4 - A crate is given an initial speed of 3.0 m/s up...Ch. 4 - Prob. 61PCh. 4 - Prob. 62PCh. 4 - The coefficient of kinetic friction for a 22-kg...Ch. 4 - On an icy day, you worry about parking your car in...Ch. 4 - Two masses mA= 2.0 kg and mB= 5.0 kg are on...Ch. 4 - Prob. 66PCh. 4 - Prob. 67PCh. 4 - A 2.0-kg purse is dropped from the top of the...Ch. 4 - Prob. 69GPCh. 4 - 70. A 75.0-kg person stands on a scale in an...Ch. 4 - Prob. 71GPCh. 4 - Prob. 72GPCh. 4 - Prob. 73GPCh. 4 - Prob. 74GPCh. 4 - Prob. 75GPCh. 4 - (a) What minimum force F is needed to lift the...Ch. 4 - Prob. 77GPCh. 4 - A jet aircraft is accelerating at 3.8 m/s2 as it...Ch. 4 - Prob. 79GPCh. 4 - Prob. 80GPCh. 4 - Prob. 81GPCh. 4 - Prob. 82GPCh. 4 - Prob. 83GPCh. 4 - Prob. 84GPCh. 4 - Prob. 85GPCh. 4 - Prob. 86GPCh. 4 - Prob. 87GPCh. 4 - Prob. 88GPCh. 4 - Prob. 89GPCh. 4 - Prob. 90GPCh. 4 - A 72-kg water skier is being accelerated by a ski...Ch. 4 - Prob. 92GPCh. 4 - Prob. 93GPCh. 4 - Prob. 94GPCh. 4 - Prob. 95GPCh. 4 - Prob. 96GPCh. 4 - Prob. 97GP
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- 8) A baby of mass m=10. kg is having too much fun jumping up in a baby jumper held by two bungee cords. As shown in the diagram, each cord is 30° from vertical. If the acceleration of the baby is 3.0 m/s? upward, what is the tension in each of the cords? 30° 30 a= 3.0 m/s?arrow_forwardThree mountain climbers who are roped together in a line are ascending an icefield inclined at 31.0° to the horizontal (Fig. 4-69). The last climber slips, pulling the second climber off his feet. The first climber is able to hold them both. If each climber has a mass of 75 kg, calculate the ten- sion in each of the two sections of rope between the three climbers. Ignore friction between the ice and the fallen climbers. 31.0° FIGURE 4-69 Problem 83.arrow_forwardWhen a car comes to a stop on a level highway, what force causes it to slow down? When the car increases its speed on the same highway, what force causes it to speed up? Explain.arrow_forward
- The following force vectors act on an object: i) 25 Newtons at 45 degrees north of east and ii) 50 Newtons at 30 degrees south of east. Which of the following represents the magnitude of the resultant and its angle relative to the easterly direction?~ 35.7 N 0 dg ~ 61.4 N -6.85 deg ~ 75.0 N 15 deg ~ 61.4 N 21.8 deg ~ 55.6 N -7.5 degarrow_forward3) This time we have a crate of mass 29.9 kg on an inclined surface, with a coefficient of kinetic friction 0.208. Instead of pushing on the crate, you let it slide down due to gravity. What must the angle of the incline be, in order for the crate to slide with an acceleration of 7.41 m/s^2? Question 3 options: 71.3 degrees 41.6 degrees 59.4 degrees 23.8 degreesarrow_forward1) Listen When a 54.0-kg crate is pushed across a frictionless horizontal floor with a force of 240.0 N, directed 20.0° below the horizontal, the magnitude of the aceleration of the crate is m/s². 20.0arrow_forward
- 36... Three rugby players are pulling horizontally on ropes attached to a box, which remains stationary. Player 1 exerts a force F₁ equal to 1.00 × 10² N at an angle ₁ equal to 60.0° with respect to the + direction (Figure 4-27). Player 2 exerts a force F2 equal to 2.00 × 10² N at an angle 02 equal to 37.0° with respect to the + direction. The view in the figure is from above. Ignore friction and note that gravity can be ignored in this problem. (a) Determine the force F3 exerted by player 3. State your answer by giving the components of F3 in the directions perpendicular to and parallel to the positive a direction. (b) Redraw the diagram and add the force F3 as carefully as you can. (c) Player 3's rope breaks, and player 2 adjusts by pulling with a force of magnitude F₂ equal to 1.50 × 10² N at the same angle as before. In which direction is the acceleration of the box relative to the + direction shown? (d) In part (c) the magnitude of the acceleration is measured to be 10.0 m/s².…arrow_forwardTrue or False: An object is moving to the right in a straight line on a horizontal surface at constant speed. The net force on the object is ... directed to the right. directed to the left. zero. impossible to determine from the information given.arrow_forwardQuestion 6) A crane lifts a box of mass M with an initial acceleration a. Determine the force on each of the carrier cables due to this movement. Given: M = 700 kg a=3 m/sn^2 b=3 C=4 B ВО Carrow_forward
- 3-106. If FA - 40 kN and Fis - 35 kN, determine the magnitude of the resultant force and specify the location of its point of application (x, y) on the slab. 30 kN 0.75 m 90 kN 20 kN 2.5 m 0.75 m 0.75 m 0.75 marrow_forward3-8 Determine the magnitude and direction angle of force F, so that the particle shown in Fig. P3-8 is in equilib- um. F₁ = 500 N F₂-750 N 33% 30° 60° F3 = 1000 N Fig. P3-8 0arrow_forwardA box rests on the (frictionless) bed of a truck. The truck driver starts the truck and accelerates forward. The box immediately starts to slide toward the rear of the truck bed. Discuss the motion of the box, in terms of Newton's laws, as seen (a) by Mary standing on the ground beside the truck, and (b) by Chris who is riding on the truck (Fig. 4–35). FIGURE 4-35 a Question 2. Воxarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage LearningPrinciples of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningCollege PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
- College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningCollege PhysicsPhysicsISBN:9781938168000Author:Paul Peter Urone, Roger HinrichsPublisher:OpenStax College
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781285737027
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:OpenStax College
Newton's Second Law of Motion: F = ma; Author: Professor Dave explains;https://www.youtube.com/watch?v=xzA6IBWUEDE;License: Standard YouTube License, CC-BY