CBW1999
Platinum Member
- Joined
- May 11, 2008
- Messages
- 776
- Tractor
- Kubota 7510, Toro Groundsmaster 217D
Bottom line- seat belt's save lives.
Several concepts of physics apply here.
First, when in motion (you are moving in the same direction as the tractor- apply this concept as you will)- the energy in motion will keep you going in that direction, even if you are trying to change your path. Hence, you may "jump clear" but the tractor is still moving in the same direction you just came from and since its mass is larger than you- it will travel farther than where you stopped. Have you ever seen some one change direction 90 degrees mid air?
Potential energy vs kinetic energy. Even in a car going 5 miles per hour, you body mass is still traveling that speed. if the vehicle suddenly changes direction (rolls) or stops, your body is still going in the same direction at the same velocity as before. if there is something in your way that will withstand the impact, you'll likely not go through it. however glass or an open window provide much less resistance when energy is applied and you will go through it.
Three tests to prove these theories. 1. The average person can sprint a short distance at 6 mph. sprint into a brick wall and write down you observations. 2. sprint into a glass window and write down your observations. 3. stand on a roof while holding a ten pound weight above your head- jump off and half way down, try to get out of the weights way.
After 20 years as a medic, I've seen more than I wanted to in regards to preventable injuries. If any of these examples helps you educate someone who is not a "believer", it will have served it's purpose. Several examples posted by others are right on as well (clothes catching on the tractor).
There is nothing sadder than seeing a family grieving over a death that was preventable.
(yes I have been to low speed accidents resulting in Fatalities, and yes, a seatbelt would have prevented it)
Several concepts of physics apply here.
First, when in motion (you are moving in the same direction as the tractor- apply this concept as you will)- the energy in motion will keep you going in that direction, even if you are trying to change your path. Hence, you may "jump clear" but the tractor is still moving in the same direction you just came from and since its mass is larger than you- it will travel farther than where you stopped. Have you ever seen some one change direction 90 degrees mid air?
Potential energy vs kinetic energy. Even in a car going 5 miles per hour, you body mass is still traveling that speed. if the vehicle suddenly changes direction (rolls) or stops, your body is still going in the same direction at the same velocity as before. if there is something in your way that will withstand the impact, you'll likely not go through it. however glass or an open window provide much less resistance when energy is applied and you will go through it.
Three tests to prove these theories. 1. The average person can sprint a short distance at 6 mph. sprint into a brick wall and write down you observations. 2. sprint into a glass window and write down your observations. 3. stand on a roof while holding a ten pound weight above your head- jump off and half way down, try to get out of the weights way.
After 20 years as a medic, I've seen more than I wanted to in regards to preventable injuries. If any of these examples helps you educate someone who is not a "believer", it will have served it's purpose. Several examples posted by others are right on as well (clothes catching on the tractor).
There is nothing sadder than seeing a family grieving over a death that was preventable.
(yes I have been to low speed accidents resulting in Fatalities, and yes, a seatbelt would have prevented it)