College Physics
1st Edition
ISBN: 9781938168000
Author: Paul Peter Urone, Roger Hinrichs
Publisher: OpenStax College
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 4, Problem 15CQ
When you take off in a jet aircraft, there is a sensation of being pushed back into the seat. Explain why you move backward in the seat—is there really a force backward on you? (The same reasoning explains whiplash injuries, in which the head is apparently thrown backward.)
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
Your 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?
A 1,000 kg car traveling along the highway at 30 m/s slows to 10 m/s in 5.0 s. The magnitude
of the average force acting on the car during this time is about * 5
O 1 kN
O 2 kN
O 3 kN
O 4 kN
O 5 kN
A 80 kg woman on roller skates pushes a 30 kg girl, also on roller skates, with a force of 100 N. The
magnitude of the force exerted by the girl on the woman is
O 200 N
O 100 N
O 50 N
O 40 N
O 38 N
zero
Chapter 4 Solutions
College Physics
Ch. 4 - Propose a force standard different from the...Ch. 4 - What properties do forces have that allow us to...Ch. 4 - How are inertia and mass related?Ch. 4 - What is the relationship between weight and mass?...Ch. 4 - Which statement is correct? (a) Net force causes...Ch. 4 - Why can we neglect forces such as those holding a...Ch. 4 - Explain how the choice of the “Stem of interest”...Ch. 4 - Describe a situation in which the net external...Ch. 4 - A system can have a nonzero velocity while the net...Ch. 4 - A rock is thrown straight up. What is the net...
Ch. 4 - (a) Give an example of different net external...Ch. 4 - If the acceleration of a system is zero, are no...Ch. 4 - If a constant, nonzero force is applied to an...Ch. 4 - The gravitational force on the basketball in...Ch. 4 - When you take off in a jet aircraft, there is a...Ch. 4 - A device used since the 1940s to measure the kick...Ch. 4 - Describe a Situation in which one a force on and,...Ch. 4 - Why does an ordinary rifle recoil (kick backward)...Ch. 4 - An American football lineman reasons that it is...Ch. 4 - Newton's third law of motion tells us that forces...Ch. 4 - If a leg is suspended by a traction setup as shown...Ch. 4 - Ina traction setup a broken bone, with pulleys and...Ch. 4 - To simulate the apparent weightlessness of space...Ch. 4 - A cartoon shows the toupee coming off the head of...Ch. 4 - Explain, in terms of the properties of the four...Ch. 4 - What is the dominant force between astronomical...Ch. 4 - Give a detailed example of the exchange of a...Ch. 4 - A 63.0-kg sprinter starts a race with an...Ch. 4 - If the sprinter from the previous problem...Ch. 4 - A cleaner pushes a 4.50-kg laundry cart in such a...Ch. 4 - Since astronauts in orbit are apparently...Ch. 4 - In Figure 4.7, the net external force on the 24-kg...Ch. 4 - The same rocket sled drawn in Figure 4.31 is...Ch. 4 - (a) If the rocket sled shown in Figure 4.32 starts...Ch. 4 - What is the deceleration of the rocket sled if it...Ch. 4 - Suppose two children push horizontally, but in...Ch. 4 - A powerful motorcycle can produce an acceleration...Ch. 4 - The rocket sled shown in Figure 4.33 accelerates...Ch. 4 - Repeat the previous problem for the situation in...Ch. 4 - The weight of an astronaut plus his space suit on...Ch. 4 - Suppose the mass of a fully loaded module in which...Ch. 4 - What net external force is exerted on a 1100-kg...Ch. 4 - A brave but inadequate rugby player is being...Ch. 4 - Two teams of nine members each engage in a tug of...Ch. 4 - What force does a trampoline have to apply to a...Ch. 4 - (a) Calculate the tension in a vertical strand of...Ch. 4 - Suppose a 60.0-kg gymnast climbs a rope. (a) What...Ch. 4 - Show that, as stated in the text, a force F...Ch. 4 - Consider the baby being weighed in Figure 4.34....Ch. 4 - A 5.00105 -kg rocket is accelerating straight up....Ch. 4 - The wheels of a midsize car exert a force of 2100...Ch. 4 - Calculate the force a 70.0-kg high jumper must...Ch. 4 - When landing after a spectacular somersault, a...Ch. 4 - A freight train consists of two 8.00104 -kg...Ch. 4 - Commercial airplanes are sometimes pushed out of...Ch. 4 - A 1100-kg car pulls a boat on a trailer. (a) What...Ch. 4 - (a) Find the magnitudes of the forces F1 and F2...Ch. 4 - Two children pull a third child on a snow saucer...Ch. 4 - Suppose your car was mired deeply in the mud and...Ch. 4 - What force is exerted on the tooth in Figure 4.38...Ch. 4 - Figure 4.39 shows Superhero and Trusty Sidekick...Ch. 4 - A nurse pushes a cart by exerting a force on the...Ch. 4 - Construct Your Own Problem Consider the tension in...Ch. 4 - Construct Your Own Problem Consider people pushing...Ch. 4 - Unreasonable Results (a) Repeat Exercise 4.29, but...Ch. 4 -
Ch. 4 - A flea jumps by exerting a force of 1.20105 N...Ch. 4 - Two muscles in the back of the leg pull upward on...Ch. 4 - A 76.0-kg person is being pulled away from a...Ch. 4 - Integrated Concepts A 35.0-kg dolphin decelerates...Ch. 4 - Integrated Concepts When starting a foot race, a...Ch. 4 - Integrated Concepts A large rocket has a mass of...Ch. 4 - Integrated Concepts A basketball player jumps...Ch. 4 - Integrated Concepts A 2.50-kg fireworks shell is...Ch. 4 - Integrated Concepts Repeat Exercise 4.47 for a...Ch. 4 - Integrated Concepts An elevator filled with...Ch. 4 - Unreasonable Results (a) What is the final...Ch. 4 - Unreasonable Results A 75.0-kg man stands on a...Ch. 4 - (a) What is the strength of the weak nuclear force...Ch. 4 - (a) What is the ratio of the strength of the...Ch. 4 - What is the ratio of the strength of the strong...
Additional Science Textbook Solutions
Find more solutions based on key concepts
1. a. Can a vector have nonzero magnitude if a component is zero? If no, why not? If yes, give an example.
b. C...
College Physics: A Strategic Approach (3rd Edition)
5. A 65 kg gymnast wedges himself between two closely spaced vertical walls by pressing his hands and feet ag...
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
The pV-diagram of the Carnot cycle.
Sears And Zemansky's University Physics With Modern Physics
Does a gas do any work when it expands adiabatically? If so, what is the source of the energy needed to do this...
University Physics Volume 2
Mark the position of each of the labeled points at a later time when the wheel has completed one half of a turn...
Tutorials in Introductory Physics
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
- A certain car (Mazda Miata) has a mass of 1080 kg and can go from zero to 26.8 m/s (0 to 60 mph)in 7.9 seconds. What magnitude of net force must act on the car to cause this?arrow_forwardAs a rocket ascends, its acceleration increases even though the net force on it stays constant. Why? (Assume a traveling distance small enough that the thrust, acceleration due to gravity and atmosphere do not change.) As the rocket ascends, fuel is burned at a faster rate resulting in a larger acceleration.The rocket's mass decreases as its fuel is consumed. The same net force acting on a smaller mass results in a larger acceleration. The faster a rocket moves the more acceleration is imparted to it from a given force.As a rocket ascends its momentum increases with its speed. The greater the momentum of the rocket, the greater the acceleration imparted to it from a given force.arrow_forwardA 75-kg petty thief wants to escape from a third-story jail window. Unfortunately, a makeshift rope made of sheets tied together can support a mass of only 58 kg. How might the thief use this “rope” to escape? Give a quantitative answer.arrow_forward
- A 300 kg elevator on planet Zico (g313 m/s/s) is at rest on the TOP floor whilst being suspended by a thick steel rope with tension, T. The elevator now accelerates downwards at 5 m/s/s. During this downward acceleration, the rope tension, T, in the steel rope will be ? Explain your answer in RATIONALE section! O A. 2000N whilst it were stationary and now 1200 N whilst accelerating downwards. B. remains the same throughout movement. OC. 3900N whilst it were stationary and now 1500 N whilst accelerating downwards. D. 3900 N whilst it were stationary and now 2400 N whilst accelerating downwards.arrow_forwardTiny, the 50 [kg] turtle, is standing on a scale in an elevator. While the elevator is accelerating upwards at a rate of 2 [m/s2], what does the scale read?arrow_forwardA “sun yacht” is a spacecraft with a large sail that is pushed by sunlight. Although such a push is tiny, it can be used to send the spacecraft outward from the Sun in a cost-free but slow propulsion. Suppose that the spacecraft has a mass of 900 kg and receives a push of 20 N,a) What is the magnitude of the resulting acceleration?b) How far will it travel in 1 day? c) How fast will it then be moving?arrow_forward
- You 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_forwardJimmy's heart accelerates 2.4 x 102kg of blood from 0.15 m/s to 0.32 m/s over an elapsed time of 0.12s every time he sees Janine. Find the magnitude of the acceleration of the blood and use that value to calculate the net force needed to cause that acceleration.arrow_forwardA 200 g wooden block moves with constant speed (on a wooden track) when the total force applied is 50 g. If a 100-g mass is added to the block of wood, how much force (in grams) must be added to the pan to make the block move with constant speed? O 75g O 50g O 25g O 100garrow_forward
- School bus drivers are extra careful when they cross railroad tracks. They stop before they cross railroad tracks to be sure that there is no train coming. Yet, trains typically move more slowly through towns than cars do. If trains usually move more slowly than cars, why can they do more damage if they hit something in their path?arrow_forwardIn the classic 1950 science-fiction film Rocketship X-M, a spaceship is moving in the vacuum of outer space, far from any star or planet, when its engine dies. As a result, the spaceship slows down and stops. What does Newton’s first law say about this scene?arrow_forwardWhen blocking in football, a defending lineman often attempts to get his body under the body of his opponent and push upward. What effect does this have on the friction force between the opposing lineman’s feet and the ground?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 Learning
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning
Newton's First Law of Motion: Mass and Inertia; Author: Professor Dave explains;https://www.youtube.com/watch?v=1XSyyjcEHo0;License: Standard YouTube License, CC-BY