Solution Found!

Physics / College Physics 1 / Chapter 8 / Problem 8

College Physics | 1st Edition | ISBN: 9781938168000 | Authors: Paul Peter Urone, Roger Hinrichs

Change Question

Solved: Professional Application A car moving at 10 m/s

Chapter 8, Problem 8

(choose chapter or problem)

Get Unlimited Answers

QUESTION:

Problem 8PE

Professional Application A car moving at 10 m/s crashes into a tree and stops in 0.26 s. Calculate the force the seat belt exerts on a passenger in the car to bring him to a halt. The mass of the passenger is 70 kg.

Questions & Answers

QUESTION:

Problem 8PE

Professional Application A car moving at 10 m/s crashes into a tree and stops in 0.26 s. Calculate the force the seat belt exerts on a passenger in the car to bring him to a halt. The mass of the passenger is 70 kg.

ANSWER:

Solution 8PE

The impulse of a force is equal to the change in momentum. In other words, the rate of change of momentum is equal to the force. From the data given, we are required to calculate the force exerted by the seat belt on the passenger.

Step 1 of 2

The initial speed of the car $u=10.0$ m/s

The car stops, hence the final speed of the car $v=0$

Time taken to stop the car $t=0.26$ s

The mass of the passenger $m=70$ kg

The change in momentum of the man $\Delta{}p=70(0-10)$ kg $\cdot{}$ m/s

$\Delta{}p=\ -700$ kg $\cdot{}$ m/s

The rate of change of momentum $\frac{\Delta{}p}{t}=\frac{-700}{0.26}$ kg $\cdot{}$ m/s X 1/s

$\frac{\Delta{}p}{t}=\ -2,692$ N

Study Tools You Might Need

Chapter: 10 Problem: 92P

Introductory Chemistry 5
Classify each molecule as polar or nonpolar. (a) \(\mathrm{N}_{2} \mathrm{H}_{2}\) (b) \(\mathrm{H}_{2} \mathrm{O}_{2}\) (c) \(\mathrm{CF}_{4}\) (d) \(\mathrm{NO}_{2}\)

Chapter: 4 Problem: 4.1-8

Probability and Statistical Inference 9
In a smoking survey among boys between the ages of 12 and 17, \(78 \%\) prefer to date nonsmokers, \(1 \%\) prefer to date smokers, and \(21 \%\) dont care. Suppose seven such boys are selected randomly. Let \(X\) equal the number who prefer to date nonsmokers and \(Y\) equal the number who prefer to

Chapter: 5 Problem: 1E

Probability and Statistical Inference 9
Let \(X_{1}\) and \(X_{2} be independent Poisson random variables with respective means \(\lambda_{1}=2\) and \(\lambda_{2}=3\). Find = 2 and = 3. Find (a) \(\mathrm{P}\left(X_{1}=3, X_{2}=5\right)\) (b) \(\mathrm{P}\left(X_{1}+X_{2}=1\right)\) Hint. Note that this event can occur if and

Chapter: 1 Problem: 55P

Physics for Scientists and Engineers: A Strategic Approach with Modern Physics 3
Figure P1.55 shows a motion diagram of a car traveling down a street. The camera took one frame every \(10 s\). A distance scale is provided. a. Measure the \(x\)-value of the car at each dot. Place your data in a table, similar to Table 1.1, showing each posi

Chapter: 2 Problem: 3

Campbell Biology 9
The reactivity of an atom arises from a. the average distance of the outermost electron shell from the nucleus. b. the existence of unpaired electrons in the valence shell. c. the sum of the potential energies of all the electron shells. d. the potential energy of the valence shell. e. the energy dif

Chapter: 2 Problem: 3

Campbell Biology 10
How many electrons does fluorine have? How many electron shells? Name the orbitals that are occupied. How many electrons are needed to fill the valence shell?

Chapter: 11 Problem: 4

Concepts of Biology 1
What is the difference between micro- and macroevolution? a. Microevolution describes the evolution of small organisms, such as insects, while macroevolution describes the evolution of large organisms, like people and elephants. b. Microevolution describes the evolution of microscopic entities, such

Chapter: 10 Problem: 1

Principles of Economics 9
Which of the following is an example of a positive externality? a. Dev mows Myras lawn and is paid $100 for the service. b. Devs lawnmower emits smoke that Myras neighbor Xavier has to breathe. c. Myras newly cut lawn makes her neighborhood more attractive. d. Myras neighbor Xavier offers to pay her

Not The Solution You Need? Search for Your Answer Here:

×

Login

Login or Sign up for access to all of our study tools and educational content!

×

Register

Sign up for access to all content on our site!

Or login if you already have an account