JAMB Physics 2010 Objective — Question 2
Question 2 of 50 from the Joint Admissions and Matriculation Board (JAMB) Physics 2010 Objective paper, with the correct answer and a full explanation.
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2. Two 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. 30k v/m
- A. 130kmh-1
- B. 230 kmh-1
- C. 200kmh-1
- D. 30km/hCorrect
Explanation
To a stationary observer, a car moving at 130Km/h will appear to be at 130Km/h. However, an observer travelling at 100Km/h in the same direction as the car travelling at 130Km/h will measure the speed to be 30Km/h (the relative velocity).
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