Understanding the Concept

The impact speed is the relative speed between the two cars at the moment of impact. Since they are moving in the same direction, we need to find the difference in their speeds.

Calculation

1. Convert km/h to m/s:

* 100 km/h * (1000 m/km) * (1 h/3600 s) = 27.78 m/s

* 98 km/h * (1000 m/km) * (1 h/3600 s) = 27.22 m/s

2. Find the difference in speeds:

* 27.78 m/s - 27.22 m/s = 0.56 m/s

Answer

The impact speed is 0.56 m/s.

Important Note: Even though the difference in speed is small, a collision can still cause damage and injuries.