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if you’re in a car moving at a high speed, and you stop abruptly, what would happen when wearing a seatbelt as opposed to not wearing a seat belt? which of newton’s 3 laws would apply?

Newton's first law of motion or law of inertia

Explanation:

According to newton's first law, the law of inertia states that everybody continues its state of rest or of uniform motion in a straight line unless an uncompromised force acts on it.

When a high-speed moving car is abruptly stopped, a person sitting inside the car without wearing a seat belt continue to move forward.

Since the law of inertia opposes the state of the body which was in motion. The person would collide with the objects in his front and may cause injury.

So, while wearing a seat belt, this motion can be stopped as the person is attached to the seat. This reduces the impact and it is a safety measure.

it has to be b, about 97 percent.

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.