Wish I could help you you rock
The speed of both cars is the same ... 80 km per hour.
But their velocities are different, because DIRECTION is part of velocity, and their directions are different.
Using idea of conservation of impulse-momentum theorem, the instantaneous velocity times mass is equal to force times the change in time.
mv = Ft
To reduce the force, decrease the velocity and mass. You can also extend the time of the collision. This is why cars collapse on impact. They were design that way to reduce the force on the car and the passenger.
Hopes this helps!
Insulators are the poorest conductor of energy
