You're driving in a car at 50 km/h and bump into a car ahead traveling at 48 km/h in the same direction.The speed of impact is
A)zero.
B)2 km/h.
C)48 km/h.
D)50 km/h.
E)98 km/h.

Question

Quizplus · Accepted Answer

When two objects collide and are moving in the same direction, the relative velocity between them is the difference between their speeds.

So, the speed of impact would be:

50 km/h - 48 km/h = 2 km/h

Therefore, the best choice is B, which is 2 km/h.

You're Driving in a Car at 50 Km/h and Bump