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Newton's 2nd law is F=ma. That is Force is equal to mass times acceleration. The use of a seat belt prevents acceleration of the restrained person. This reduces the effects of the crash.
If we look at this in detail, a person is riding in a car that is travelling 25 miles an hour on a road. The person weighs 200 lbs. The things that are considered here are the speed of the car and it needs to be converted to FPS which is Feet Per Second. 25 MPH is 37 FPS. Since force equals mass times acceleration. IF that car hits a parked car then the person that is described in this scenario is going to move forward with a force of 7400 ft lbs. Depending on what the persons body hits inside the car, that amount of force can do tremendous damage and cause death. A seatbelt that is being worn stops the acceleration from taking place and distributes the force over the surface area of the straps where they are in contact with the body. That is why seatbelts must be worn correctly. There are other considerations in this scenario. The seatbelt has a little slack in it. There are things like pretension devices that take the slack out. Airbags now are installed to try and reduce forces. Cars are made to crush and reduce the forces. Another consideration is that the organs in the persons body are subjected to these forces. So the brain, liver, heart, gall bladder, spleen etc also accelerate and strike the inside of the body and become damaged.
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What do seat belts in cars have to do with newtons third law of motion?
penis
What law explains why we need to wear seat belts?
Newtons 3 Laws of Motion. http://en.wikipedia.org/wiki/Newton%27s_laws_of_motion
How do test with crash dummies seat belts and air bags illustrate Newton's first law of motion?
Because Newtons First law of motion is and object in motion stays in motion unless other outside forces are applied and and object at rest tends to stay at rest for the same reason
What does a seat belt have to do with newtons first law?
Simplifying Newton's first law.. an object continues to do whatever it happens to be doing unless a force is exerted upon it. A seat-belt - is the 'force' that changes the action of the person's body.
How do Planetary winds and Pressure belts affect climate?
Because high pressure belts have sinking motion and dry conditions. Low pressure belts have rising motions and havey rainfall. pce
How do planetary wind and pressure belts affect the climate?
Because high pressure belts have sinking motion and dry conditions. Low pressure belts have rising motions and havey rainfall. pce
What concept of physics are seat belts and airbags designed based on?
they relate to the theory behind Momentum and Impulse
Who has won second most belts in WWE?
Triple H has the second most Wwe championship/world heavyweight titles. overal with all the minor belts idk.
How vehicle restraints are influenced by newtons 3 laws?
According to Newton's first law, an object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force. It is the natural tendency of objects to keep on doing what they are doing. All objects resist changes in their state of motion. In the absence of an unbalanced force, an object in motion will maintain this state of motion. This is often called the law of inertia.
Reaction about implication of the laws of motion on safety and precaution?
These are why helmets and seat belts are important. If you are not able to stop, you need something to protect you.
How do you turn off an airbag light on a 1997 peugeot 306?
a second hand car dealer said to me that the seat belts (it is triggered by the seat belts) got wet when he cleaned it. which is why it hasn't gone off yet.
Which types of belts are used in cars?
There are "v" belts, "serpentine" belts and "timing" belts.
