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9. An athelete completes one round of a circulartrack of radius R in 40 sec. What will be hisdisplacement at the end of 2 min. 20 sec.

Answer»

2min 20 sec=140 sec140/40=3.5he will complete 3 and half roundsdisplacement is the shortest distance between the initial and the final points. so displacement will be 2R.

2min 20sec = 140seche completes one round in 40 secIn 140 sec, he completes 3and half round , So displacement = 2R



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