Question 2
MotionTwo cars moving in the same direction have speeds of 100 kmh−1 and 130 kmh−1. What is the velocity of the faster car as measured by an observer in the slower car?
- A.130kmh−1
- B.230 kmh−1
- C.200kmh−1
- D.30kmh−1
Show the answer and explanation
Answer: D (30kmh−1)
Explanation
For bodies moving in the same direction, the relative velocity is the difference of their speeds: 130 − 100 = 30 km h−1.