How does Newton's first law explain how seat belts prevent injuries in car accidents?

Answer 1

The function of seat belts in a car, in relation to the Law of Inertia, show that when the car breaks the seatbelt will stop you from sliding out of your seat. In other words, the seat belt brings you from a state of motion to a state of rest.

Answer 2

newton's 1st law is about inertia. without inertia you would just stop with the car. because of inertia you will keep going. this law states that nothing will stop without a outside force pushing against it. in a car the out side force is the seat belt.
Because the body is the same spped the car is so if your wearing you seatbelt it would stop you from being ejected

Answer 3

The first law states that every body continues in its state of rest or of uniform motion unless acted by an external force. As long as the car is moving at constant speed, all parts of the car including the occupants are moving together at the same speed. When a crash happens, invariably the uniform motion is altered, in the worst case the car comes to a sudden stop. If a person is not belted, the person keep moving forward (since he is not constrained and is not an integral part of the car) and injury happens. The seat belt first and then the improved seat belt with a shoulder harness tend to minimize the forward motion of the person by mimicking the person to be an integral part of the car. However, you can design the seat belt to such a rigidity that the body does not have room to move. The rigidity should be just sufficient to control the forawrd movement. In most cases there is a ratchet mechanism which will lock the seat belt after a collision. The air bags with the seat belt further reduces the forward motion of the body and prevents injury. In a nutshell the seat belt minimizes the effects of a sudden state change to a free body when its state changes suddenly from one of uniform motion to soemthing else like a sudden stop.

Read more: How_newtons_firt_law_of_motion_applies_in_a_car_crash_and_the_effects_of_this_law_on_a_unbelted_person_explain

Answer 4

An object at rest tends to stay at rest and an object in constant motion tends to stay in motion unless acted upon by an unbalanced force. The first law applies in this case. The car and its contents are moving at a constant rate and everything is fine. When suddenly the brake is applied, since the human is not tied to the seat with nuts and bolts, it tends to keep moving forward at the same speed that the car was travelling before the brake was applied. Since it is rather unwise to tie the human to the seat with nuts and bolts, the next best thing would be to provide a restraining agent to minimize the forward motion of the body and yet give him freedom of movement to operate the vehicle. The buttocks of the driver are a bit more rigidly fixed to the seat (relatively speaking) than the upper torso. The whole body continue to move at the speed at which the car was travelling before the brake was applied, but the upper torso moves forward farther and faster. The shoulder belt tries to minimize this speed lest the driver hit the steering column. The lap belt provides the same function to the lower portion of the body.

Answer 5

A body in motion (that is you in the car) tends to remain in motion. When the car stops suddenly (in a wreck) you tend to continue moving- until you slam into the inside of the car- breaking parts of you. The seatbelt stops you along with the car. It does not prevent the accident, but helps prevent injuries FROM the accident. So thank Sir Isaac newton, and buckle up.

Answer 6

your force going forward is met equally and oppositely by the reaction force of the seatbelt.

Answer 7

The seat belt reduces the external force of an accident and disperses the initial inertia of the collision across the body.