In a car crash, wearing a seat belt __________________.
2 answers:
In a car crash, wearing a seat belt
A. Keeps you from being thrown from the car
B. can reduce injuries
The answer is : C. all of the above
<h3>Further explanation </h3>In Newton's law, it is stated that if the resultant force acts on an object of magnitude is zero, it can be formulated:
<h3>∑F = 0 </h3>This value is for stationary objects or objects that move in a straight line
So if the resultant force on an object is zero, the object that was initially stationary will continue to remain stationary, and the object that was initially moving will continue to move at a constant speed
The size of inertia is proportional to mass, the greater the mass of the object, the greater the inertia of the object.
In objects with mass that move translatively, the object will maintain its linear velocity
When we are in a vehicle that moves forward, then we will still maintain a state of forwarding motion. If our vehicle stops suddenly, then we keep moving forward so we will be pushed forward. From this point, the use of a safety belt serves to hold back our movements so that there are no fatal injuries or collisions.
<h3>Learn more </h3>
Newton's law of inertia
example of Newton's First Law of inertia
law of motion
Keywords: inertia, Newton's First Law, collisions, injuries, car accident, crash
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Answer:
The program in cpp for the given scenario is shown below.
#include <stdio.h>
#include <iostream>
#include <fstream>
using namespace std;
int main()
{
//object created of file stream
ofstream out;
//file opened for writing
out.open("numbers.txt");
std::cout << "File opened." << std::endl;
//inside for loop, random numbers written to numbers.txt using rand()
for(int n=0; n<10; n++)
{
out<<rand()<<endl;
}
//file closed
out.close();
std::cout << "File closed." << std::endl;
return 0;
}
Explanation:
1. An object of the ofstream is created. The ofstream refers to output file stream. This is used to create file for write and append operations.
ofstream out;
2. The file named, numbers.txt, is opened using the open() method with the object of ofstream.
out.open("numbers.txt");
3. The message is displayed to the user that the file is opened.
4. Inside a for loop, which executes 10 times, a random number is generated. This random number is written to the file and a new line inserted.
5. The random number is generated using rand() method. Every number is written on new line.
out<<rand()<<endl;
6. Every execution of the for loop repeats steps 4 and 5.
7. When the loop ends, the file is closed using close() method with the object of ofstream.
out.close();
8. A message is displayed to the user that the file is closed.
9. The header file, fstream, is included to support file operations.
10. The extension of the file can be changed from .txt to any other type of file as per requirement.
11. The program can be tested for writing more numbers to the file.
12. The program can be tested for writing any type of numeric data to the file.
13. The program is written in cpp due to simplicity.
14. In other languages such as java or csharp, the code is written inside classes.
15. In cpp, all the code is written inside main() method.
16. The screenshot of the output messages displayed is attached.
