How does inertia affect a person who is not wearing a seatbelt during a collision?

Natural Forces Affecting the Driver:

1. While the car stops, the person continues moving the way that the car were moving and then hits the obstacle in the car or the person can be thrown out of the vehicle. If the person wears belt, he will stop moving with the vehicle and won't hit the obstacle.

2. We count approximate kinetic energy using the formula K = v^2. So the vehicle which is moving at 30 mph will have four times less kinetic energy than vehicle which is moving at 60 mph. If they have the same road conditions, the breaking distance will be four times as great for the car moving twice as fast.

3. Kinetic energy depends on object's mass and velocity and it has direct relationship with the stopping distance. The lesser mass of the vehicle = the lesser kinetic energy and lesser stopping distance. => If both vehicles have the same velocity, then small vehicle has lesser kinetic energy than large vehicle.

4. We know that kinetic energy has this relationship with velocity K = v^2. So the best way to prepare to enter sharp curves in the roadway is to lower the speed. The most appropriate speed is 20-30 mph, but it depends on road conditions and car's breaks condition.

5. Car crashes can happen with everyone so the best way is to be prepared. First the driver should wear a seatbelt while he's driving. He should check his tires and breaks condition regularly. And also it's important to slow down the vehicle while entering sharp curves. Without following these rules, the driver can get catastrophic injuries in a car crash.

Signs, Signals, and Pavement Markings: 

1. It doesn't matter where you go. All you need is to learn highway code. It's very different to know the meanings of every road sign. Also, it's necessary to check your car's conditions and you should take some spare parts for your car in case of accidents. So wherever you go, it's important to be prepared.

2. You should stop before crossing and take few minutes to make sure there is no train approaching. If there is no train approaching, you can pass a railroad crossing. If you see approaching train, you should wait until it will pass a railroad crossing.

3. You should stop before the lights and wait to check the traffic movement and signs. Make sure that everything is safe and pass the intersection. Don't move fast to avoid accidents.

4. Flashing yellow light means that it's not necessary to stop but you should to pay attention on the traffic movement. So it would be better to yield before the lights and make sure if it's safe to move. After that you can cross the intersection.

5. The line change means that the lane changes and you can't cross solid lines. Pay more attention on road marking because it shows how you should behave on the road or highway.

6. As you approach the next exit and  your passengers need to use the restroom and get some food, you should look for green signs which indicate food and rest stops. You should to slow down if you don't want to skip the sign.

7. When you take the exit ramp off the expressway and merge onto the next road, you see yellow lines dividing the roadway which indicates that there is oncoming traffic and this is a two-way highway. 

Natural Forces Affecting the Driver:

1. While the car stops, the person continues moving the way that the car were moving and then hits the obstacle in the car or the person can be thrown out of the vehicle. If the person wears belt, he will stop moving with the vehicle and won't hit the obstacle.

2. We count approximate kinetic energy using the formula K = v^2. So the vehicle which is moving at 30 mph will have four times less kinetic energy than vehicle which is moving at 60 mph. If they have the same road conditions, the breaking distance will be four times as great for the car moving twice as fast.

3. Kinetic energy depends on object's mass and velocity and it has direct relationship with the stopping distance. The lesser mass of the vehicle = the lesser kinetic energy and lesser stopping distance. => If both vehicles have the same velocity, then small vehicle has lesser kinetic energy than large vehicle.

4. We know that kinetic energy has this relationship with velocity K = v^2. So the best way to prepare to enter sharp curves in the roadway is to lower the speed. The most appropriate speed is 20-30 mph, but it depends on road conditions and car's breaks condition.

5. Car crashes can happen with everyone so the best way is to be prepared. First the driver should wear a seatbelt while he's driving. He should check his tires and breaks condition regularly. And also it's important to slow down the vehicle while entering sharp curves. Without following these rules, the driver can get catastrophic injuries in a car crash.

Signs, Signals, and Pavement Markings: 

1. It doesn't matter where you go. All you need is to learn highway code. It's very different to know the meanings of every road sign. Also, it's necessary to check your car's conditions and you should take some spare parts for your car in case of accidents. So wherever you go, it's important to be prepared.

2. You should stop before crossing and take few minutes to make sure there is no train approaching. If there is no train approaching, you can pass a railroad crossing. If you see approaching train, you should wait until it will pass a railroad crossing.

3. You should stop before the lights and wait to check the traffic movement and signs. Make sure that everything is safe and pass the intersection. Don't move fast to avoid accidents.

4. Flashing yellow light means that it's not necessary to stop but you should to pay attention on the traffic movement. So it would be better to yield before the lights and make sure if it's safe to move. After that you can cross the intersection.

5. The line change means that the lane changes and you can't cross solid lines. Pay more attention on road marking because it shows how you should behave on the road or highway.

6. As you approach the next exit and  your passengers need to use the restroom and get some food, you should look for green signs which indicate food and rest stops. You should to slow down if you don't want to skip the sign.

7. When you take the exit ramp off the expressway and merge onto the next road, you see yellow lines dividing the roadway which indicates that there is oncoming traffic and this is a two-way highway. 

1) to answer the question on how inertia affects a person in a car who is not wearing a seat belt is that a seat belt causes inertia to go into affect quicker , because we will continue moving at the speed of the car. For instance, if a car is moving at a speed of 20 miles per hour, are body will continue to move at the speed unless an unbalanced force acts upon it.

Inertia is the tendency of an object to stay in motion when it is in motion. This is basically Newton's first law. The person in the car is still in motion when the car crashes and If there's no seatbelt to increase the time of the crash then there will be a larger force. 2. A car traveling at a higher rate of speed will have more kinetic energy than if it were to be traveling at a lower speed. The formula for kinetic energy is (1/2)* mass* velocity^2. Therefore doubling the velocity will affect it by a factor of 4. (4x greater). 3. A driver can slow down before entering the curve as a smaller tangent velocity will affect the centripetal force less. 4. Force= mass* acceleration so if a car has a higher acceleration then there will be a greater force of impact. And this also goes back to question 1 with the seatbelts.

1. Inertia causes the person to be thrown forward when the driver hits the break or when the car is in a collision.
2. Kinetic energy is higher when the velocity is higher so it is more difficult and requires a greater further stopping distance when the vehicle is travelling at 60 mph than at 30 mph.
3. Kinetic energy is higher when the mass is higher so a large and heavier vehicle requires a greater stopping distance than a small vehicle.
4. He can slow down.
5. Because cars colliding in different velocities produced different forces of impact.

 A person not wearing a seat belt will keep moving forward if the vehicle stops suddenly due to inertia or the conservation of momentum which continues the forward movement of the car in the person. A vehicle travelling at 60 mph will have more kinetic energy than one travelling at 30 mph  so will have a longer stopping distance. A larger vehicle having more weight will have a longer stopping distance than a small or lighter vehicle. Entering sharp curves should be done by reducing the velocity to counteract the centrifugal force of going around the curve. Minor injuries are most often happening at low speeds and with seat belt protection whereas catatstrophic injuries can be say when a car rolls over or hits say a semi-trailer with a lot of weight and momentum.

1. during a collision, the person not wearing a seatbelt is already in motion. there is no outside force (the seatbelt) to stop this motion. 
2. Kinetic Energy = 0.5 * m * v^2  because velocity is a squared term, doubling the velocity actually quadruples the kinetic energy, making the stopping distance much much greater
3. by the same logic as above, mass is not a squared term, therefore doubling the mass will double the kinetic energy, increasing the stopping distance -- but by not as much as increasing the velocity.
4. because a driver cannot alter the mass of his vehicle, the best way to enter sharp curves would be decreasing velocity (speed)
5. there are many factors that determine the degree of damage (to humans and property in a crash), most notably the size of the vehicle(s) and velocity.

1) to answer the question on how inertia affects a person in a car who is not wearing a seat belt is that a seat belt causes inertia to go into affect quicker , because we will continue moving at the speed of the car. For instance, if a car is moving at a speed of 20 miles per hour, are body will continue to move at the speed unless an unbalanced force acts upon it.

1) Inertia is the tendency of an object in motion to keep moving in straight line with constant velocity, or to remain at rest if the object was initially at rest. A person in a moving car is moving together with the car, so his inertia is his tendency to keep moving with constant velocity. During a collision, therefore, if the person is not wearing a seatbelt, he will continue to move forrward due to his inertia (while the car will stop due to the crash), and eventually he will hit the windscreen of the car.

2) The more the kinetic energy, the larger the distance needed to stop the car. In fact, calling vi the initial speed of the car, vf the final velocity (which is zero, because we want the car to stop), a the deceleration of the car and S the stopping distance, we can use the following relationship:

Since vf=0, we can rewrite the stopping distance as

The vehicle in the two situations is the same, so we see that the larger the initial velocity (which means more kinetic energy), the larger the stopping distance. In particular, in this case the velocity in the second situation (60 mph) is twice the velocity in the first situation (30 mph), so the stopping distance in the second situation is  times larger than in the first situation.

3) The large vehicle has a larger mass than the small vehicle, so it also has greater kinetic energy, which is given by:

where m is the mass of the car and v is its velocity. Due to its larger mass, the large vehicle has a greater inertia: it means it would take more effort to stop it. In fact, the work done to stop the car is W=FS, where F is the force of the brakes and S is the stopping distance. For the work-energy theorem, this work is equal to the initial kinetic energy of the car:

If we assume the brakes in the two cars can apply the same force, then we see that the larger the mass m, the larger the stopping distance S.

4) The best way for the driver to prepare to enter the sharp curve is to decrease the velocity: in fact, decreasing the velocity (and so, decreasing the kinetic energy) will allow him to stay in the curved path more easily. If the car is going too fast, it will tend to go straight away (due to its inertia), and it won't be able to do the curve.

5) The damages produced by a car crash depend on the energy involved in the accident: the more the energy released, the larger the damages. In particular, since we are talking about kinetic energy

we see that the larger the mass of the vehicle, the greater the energy involved and so the larger the damages; and similarly, the larger the speed of the vehicle v, the greater the energy involved and so the larger the damages of the car crash.

Inertia will cause an object in motion to stay in motion. So when a car is in a collision, the components inside the cars will continue moving if there is nothing keeping the objects from moving. Therefore, the person will continue moving and possibly fly through the windshield of the car.