Relative Motion
Two trains approach each other at 40 km/h and 60 km/h. Relative speed is:
Select the correct option:
Solution
100 km/h
When two objects move towards each other (opposite directions), their relative speed is the sum of their individual speeds. Relative speed vrel=v1+v2=40+60=100 km/h. This means to an observer in either train, the other train appears to be approaching at 100 km/h.
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About This Question
- Subject
- physics
- Chapter
- kinematics
- Topic
- relative motion
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
100 km/h
When two objects move towards each other (opposite directions), their relative speed is the sum of their individual speeds. Relative speed vrel=v1+v2=40+60=100 km/h. This means to an observer in either train, the other train appears to be approaching at 100 km/h.
This easy difficulty physics question is from the chapter kinematics, covering the topic of relative motion. It appeared in the 2025 exam.
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