When two objects move in the same direction, their relative speed is the difference between their individual speeds. The time taken for one object to cross another is the distance (usually the length of the object doing the crossing) divided by the relative speed.
- The hands coincide when the minute hand covers the initial angular distance between the hands at the start of the hour at the relative speed. 215. A train of length 140 m is running at a speed of 60 km/hr and a dog is running in the same direction parallel to the train at a speed of 18 km/hr. The train will cross the dog in
Asked in BPSC Prelims Exam 67th Re Exam · Topic: Mechanics (Newton's Laws of Motion and their applications)
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