College Physics: A Strategic Approach (4th Edition)
4th Edition
ISBN: 9780134609034
Author: Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 4, Problem 20CQ
Suppose that, while in a squatting position, you stand on your hands, and then you pull up on your feet with a great deal of force. You are applying a large force to the bottoms of your feet, but no matter how strong you are, you will never be able to lift yourself off the ground. Use your understanding of force and motion to explain why this is not possible.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Two people play tug of war. The 100-kg person on the left pulls with 1100 N, and the 75-kg person on the right pulls with 870 N.
Assume that neither person releases their grip on the rope with either hand at any time, assume that the rope is always taut, and
assume that the rope does not stretch. What is the magnitude of the tension in the rope in Newtons?
Add your answer
Two blocks are connected via a pulley, both blocks have a mass of 10.kg. One block rests on a horizontal surface and the other one hangs freely by a cord which passes over a pulley. Assume the cord does not stretch, ignore mass of pulley and cord, therefore acceleration is the same for both blocks and tension is the same for both blocks. The hanging block moves down so the block lying on the horizontal surface moves to the right.
What is the acceleration (m/s^2) of the blocks if the coefficient of friction between the block and the surface is 0.50.
Note: Please express finals answers in significant figures and scientific notation only, thanks!!
Two blocks are connected via a pulley, both blocks have a mass of 10.kg. One block rests on a horizontal surface and the other one hangs freely by a cord which passes over a pulley. Assume the cord does not stretch, ignore mass of pulley and cord, therefore acceleration is the same for both blocks and tension is the same for both blocks. The hanging block moves down so the block lying on the horizontal surface moves to the right.
What is the acceleration (m/s^2) of the blocks if the coefficient of friction between the block and the surface is 0.50.
Chapter 4 Solutions
College Physics: A Strategic Approach (4th Edition)
Ch. 4 - If an object is not moving, does that mean that...Ch. 4 - An object moves in a straight line at a constant...Ch. 4 - If you know all of the forces acting on a moving...Ch. 4 - Three arrows are shot horizontally. They have left...Ch. 4 - Prob. 5CQCh. 4 - Internal injuries in vehicular acci-dents may be...Ch. 4 - Heres a great everyday use of the physics...Ch. 4 - Prob. 8CQCh. 4 - Suppose you are an astronaut in deep space, far...Ch. 4 - Jonathan accelerates away from a stop sign. His...
Ch. 4 - Prob. 11CQCh. 4 - Prob. 12CQCh. 4 - Josh and Taylor, standing face-to-face on...Ch. 4 - A person sits on a sloped hillside. Is it ever...Ch. 4 - Walking without slipping requires a static...Ch. 4 - Figure 4.30 b showed a situation in which the...Ch. 4 - Prob. 17CQCh. 4 - Prob. 18CQCh. 4 - The tire on this drag racer is severely twisted:...Ch. 4 - Suppose that, while in a squatting position, you...Ch. 4 - A block has acceleration a when pulled by a...Ch. 4 - A 5.0 kg block has an acceleration of 0.20 m/s2...Ch. 4 - Tennis balls experience a large drag force. A...Ch. 4 - A group of students is making model cars that will...Ch. 4 - A person gives a box a shove so that it slides up...Ch. 4 - Prob. 26MCQCh. 4 - As shown in the chapter, scallops use jet...Ch. 4 - Prob. 28MCQCh. 4 - Prob. 29MCQCh. 4 - Dave pushes his four-year-old son Thomas across...Ch. 4 - Figure Q4.29 shows block A sitting on top of block...Ch. 4 - Whiplash injuries during an automobile accident...Ch. 4 - An automobile has a head-on collision. A passenger...Ch. 4 - In a head-on collision, an infant is much safer in...Ch. 4 - Problems 4 through 6 show two forces acting on an...Ch. 4 - Problems 4 through 6 show two forces acting on an...Ch. 4 - Problems 4 through 6 show two forces acting on an...Ch. 4 - Prob. 7PCh. 4 - Prob. 8PCh. 4 - A baseball player is sliding into second base....Ch. 4 - A jet plane is speeding down the runway during...Ch. 4 - A skier is sliding down a 15 slope. Friction is...Ch. 4 - A falcon is hovering above the ground, then...Ch. 4 - Figure P4.13 shows an acceleration-versus-force...Ch. 4 - A constant force applied to object A causes it to...Ch. 4 - A compact car has a maximum acceleration of 4.0...Ch. 4 - Prob. 16PCh. 4 - A constant force is applied to an object, causing...Ch. 4 - A man pulling an empty wagon causes it to...Ch. 4 - Prob. 19PCh. 4 - Scallops eject water from their shells to provide...Ch. 4 - Figure P4.21 shows an objects...Ch. 4 - Prob. 22PCh. 4 - Two children fight over a 200 g stuffed bear. The...Ch. 4 - Prob. 24PCh. 4 - Prob. 25PCh. 4 - Prob. 26PCh. 4 - Prob. 27PCh. 4 - Prob. 28PCh. 4 - Problems 27 through 29 show a free-body diagram....Ch. 4 - Problems 27 through 29 show a free-body diagram....Ch. 4 - Problems 27 through 29 show a free-body diagram....Ch. 4 - Prob. 32PCh. 4 - Problems 30 through 38 describe a situation. For...Ch. 4 - Problems 30 through 38 describe a situation. For...Ch. 4 - Problems 30 through 38 describe a situation. For...Ch. 4 - Problems 30 through 38 describe a situation. For...Ch. 4 - Problems 30 through 38 describe a situation. For...Ch. 4 - Prob. 38PCh. 4 - Problems 30 through 38 describe a situation. For...Ch. 4 - Problems 30 through 38 describe a situation. For...Ch. 4 - Prob. 41PCh. 4 - Prob. 42PCh. 4 - Three ice skaters, numbered 1, 2, and 3, stand in...Ch. 4 - A girl stands on a sofa. Identify all the...Ch. 4 - A car is skidding to a stop on a level stretch of...Ch. 4 - Squid use jet propulsion for rapid escapes. A...Ch. 4 - Prob. 47GPCh. 4 - Prob. 48GPCh. 4 - Prob. 49GPCh. 4 - Prob. 50GPCh. 4 - Prob. 51GPCh. 4 - Prob. 52GPCh. 4 - Problems 49 through 61 describe a situation. For...Ch. 4 - Problems 49 through 61 describe a situation. For...Ch. 4 - Problems 49 through 61 describe a situation. For...Ch. 4 - Prob. 56GPCh. 4 - Prob. 57GPCh. 4 - Problems 49 through 61 describe a situation. For...Ch. 4 - Problems 49 through 61 describe a situation. For...Ch. 4 - Prob. 60GPCh. 4 - Problems 49 through 61 describe a situation. For...Ch. 4 - Problems 49 through 61 describe a situation. For...Ch. 4 - Problems 49 through 61 describe a situation. For...Ch. 4 - Problems 49 through 61 describe a situation. For...Ch. 4 - A bag of groceries is on the back seat of your car...Ch. 4 - A car has a mass of 1500 kg. If the driver applies...Ch. 4 - Prob. 67GPCh. 4 - Prob. 69GPCh. 4 - Prob. 70GPCh. 4 - Prob. 71GPCh. 4 - The froghopper, champion leaper of the insect...Ch. 4 - A beach ball is thrown straight up, and some time...Ch. 4 - If your car is stuck in the mud and you dont have...Ch. 4 - Prob. 75MSPPCh. 4 - Prob. 76MSPPCh. 4 - If your car is stuck in the mud and you don't have...
Additional Science Textbook Solutions
Find more solutions based on key concepts
The change in internal energy of the system if work done on the system is 42 J and the heat added to the system...
Physics (5th Edition)
A diver bounces straight up from a diving board, avoiding the diving board on the way down, and falls feet firs...
University Physics Volume 1
66. Astronauts use a centrifuge to simulate the acceleration of a rocket launch. The centrifuge takes 30 s to...
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
If you make an account of 1000 people born in the year 2000 and find that half of them are still living in 2060...
Conceptual Integrated Science
27. An old-fashioned single-play vinyl record rotates on a turntable at 45 rpm. What are (a) the angular veloci...
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
17. (II) Compute the voltage drop along a 21-m length of household no. 14 copper wire (used in 15-A circuits). ...
Physics: Principles with Applications
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
- Does the ground need to exert a force on you for you to jump off the ground, or do you need to exert a force on the ground? If the ground must exert a force on you, is that force greater than the force you exert on the ground?arrow_forwardSuppose that, while in a squatting position, you stand on your hands, and then you pull up on your feet with a great deal of force. You are applying a large force to the bottoms of your feet, but no matter how strong you are, you will never be able to lift yourself off the ground. Use your understanding of force and motion to explain why this is not possible.arrow_forwardYour car just ran out of gas and you are stuck in the middle of the road holding up traffic. Luckily, your friend Reuben is in the car with you so you decide to ask for his help in pushing the car to the side of the road. Reuben, being very lazy and having just taken PHYS 151, explains to you that it’s useless to try pushing the car to get it moved to the side of the road. His reasoning is that when you exert a force on the car, the car will exert an equal and opposite force in return according to Newton’s third law of motion. These two opposing forces would cancel each other resulting in a net force of zero and no possible acceleration – therefore, it’s better to just sit back, relax, and wait for AAA. Do you agree with his assessment? Why or why not? If you don’t agree with him, how would you convince him otherwise to help you?arrow_forward
- QUESTION 1: If you can exert a pull that is greater than your weight, why can’t you fly off the ground by pulling your belt upward? because the Earth will pull you downward with the same force, so they cancel out because your body exerts the same amount of force on you, so they cancel out because the normal force and your weight cancel out just before you pull your belt upward not enough information is given QUESTION 2: You are pushing a box to the right with a 210-N force. How much force does the box exert on you? less than 210 N, to the left equal to 210 N, to the left equal to 210 N, to the right greater than 210 N, to the leftarrow_forwardYou have most likely been in an elevator that accelerates upward as it moves toward a higher floor. In this case, you feel heavier. In fact, if you are standing on a bathroom scale at the time, the scale measures a force having a magnitude that is greater than your weight. Therefore, you have tactile and measured evidence that leads you to believe you are heavier in this situation. Are you heavier?arrow_forwardYou find an abandoned car in a Walmart parking lot. The car is locked. You look up the car on Kelly’s Blue Book and find the mass to be 1200 kg. You go and push the car. How much force would you have to apply to get the car to start sliding? If you continued to apply this same force, determine the acceleration of the car. If you pushed for 20 s, how far would the car travel? (use dry concrete)arrow_forward
- Train cars are connected by couplers, which are under tension as the locomotive pulls the train. Imagine you are on a train speeding up with a constant acceleration. As you move through the train from the locomotive to the last car, measuring the tension in each set of couplers, does the tension increase, decrease, or stay the same? When the engineer applies the brakes,the couplers are under compression. How does this compression force vary from the locomotive to the last car? (Assume only the brakes on the wheels of the engine are applied.)arrow_forwardDoes changing the mass of the object affect the acceleration? I was to conduct an experiment where the motion of an object sliding on an inclined air track under the influence of gravity is observed. In order to demonstrate the effects of force while minimizing friction, the air track has lines of holes drilled along the top faces. My thought process: because f=ma I thought yes, but I have also gathered data that shows me that increasing mass does not necessarily mean increasing/decreasing a.arrow_forwardDuring 4th period Jada was a beast. She resisted the forces applied by 5 people in his class all at once. Each person applied a force of 17 N and Jada still did not move. How much force was Jada pushing back with? O 85 N 55 N 65 N O 95 Narrow_forward
- An elevator car has two equal masses attached to the ceiling as shown. (Assume m = 4.10 kg.) m a T2 m (a) The elevator ascends with an acceleration of magnitude 1.70 m/s2. What are the tensions in the two strings? (Enter your answers in N.) T1 = N T, = (b) The maximum tension the strings can withstand is 101.2 N. What is the maximum acceleration of the elevator so that a string does not break? (Enter the magnitude in m/s?.) m/s? Need Help? Read Itarrow_forwardA rope 17 cm is suspended between two hooks, 13 cm apart and at the same level. What is the pull on each hook, if a weight of 450 N is hanging 5 cm from the right hook? I didn't understand the previous answer so i had to submit again, please explain it well. Thank youarrow_forwardA person is pushing two boxes placed side by side with each other. What is the acceleration caused by the applied force if the net force is 200.57 N, the coefficient of kinetic friction of the boxes is 0.085 and the sum of the mass of the boxes is 88.89 kg? Is it possible to have one of the boxes generate an applied force of 140.7 N, if yes, what is the mass of the other box? Show an Illustration.arrow_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 Learning
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
Newton's Third Law of Motion: Action and Reaction; Author: Professor Dave explains;https://www.youtube.com/watch?v=y61_VPKH2B4;License: Standard YouTube License, CC-BY