a train moving at as constant speed of 54kmph moves eastwards for 30min then north for 40 min find average velocity
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Hey!
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Average velocity= Displacement / time
Distance cover in first 30 minutes is= 54*1/2 =27 km (30min= 1/2 hr)
Distance cover in next 40 minutes is=54*40/60 = 36 km
- See the above diagram,
displacement of the object in 70 minutes or 7/6 he is-
From point I to point F = √(27)2+(36)2
=√2045
So displacement= 45 km
And average velocity= 45/(7/6) = 38.79 km/hr
_______________________________
Hope it helps :)
____________________________
Average velocity= Displacement / time
Distance cover in first 30 minutes is= 54*1/2 =27 km (30min= 1/2 hr)
Distance cover in next 40 minutes is=54*40/60 = 36 km
- See the above diagram,
displacement of the object in 70 minutes or 7/6 he is-
From point I to point F = √(27)2+(36)2
=√2045
So displacement= 45 km
And average velocity= 45/(7/6) = 38.79 km/hr
_______________________________
Hope it helps :)
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