Question

If two vehicles are traveling at a speed of 50 miles per hour and they collide with one another, the speed of the head-on impact is actually ___ miles per hour.

Answer 1

`v_(f)` = 0 miles/h

Step-by-step explanation:

This exercise should be resolved with the moment. The system is formed by the two cars. Let's write the moment

Initial. Before the crash

p₀ = m v₁ - m v₂

The sign is because they go in the opposite direction

Final. After the crash

`p_(f)` = (m + m)
`v_(f)`

The moment is preserved

p₀ =
`p_(f)`

m v₁- m v₂ = 2m
`v_(f)`

`v_(f)` = m / 2m (v₁-v₂)

But the speed of the cars is the same v1 = v2 = 50 liters / h

`v_(f)` = 0

so the two faces do not move after the crash