1. Kinetic Energy
E = ½mv2

2. Kinetic Energy
E = ½mv2
In a crash the energy to be dissipated is proportional to the square of the velocity

3. So the energy to be dissipated at 20 mph is 4 x that at 10 mph
Kinetic Energy
E = ½mv2
In a crash the energy to be dissipated is proportional to the square of the velocity
So the energy to be dissipated at 20 mph is 4 x that at 10 mph

4. So the energy to be dissipated at 100 mph is 100 x that at 10 mph

5. And remember for two cars at 50mph head on the relative velocity is 100mph

7. E = ½mv2
Kinetic Energy

8. So the energy to be dissipated at 100 mph is 100 x that at 10 mph