Newton has three laws of motion. seat belts are used to keep the passengers remaining in their seats during an accident. if the seat belts are not present the passengers would continue to move forward when the car stops. which of newtons three laws does this demonstrates? 1st law2nd law3rd lawwe use simple machines in our daily life. if i use a knife to cut my sandwich for lunch, i've used less force and done less work. i've used more force and done more work. i've used less force and done the same amount of work.