A train 100 m long is moving with a velocity of 60 km/hr. Find the time it takes to cross the bridge 1 km long.  from Physics Motion in A Plane Class 11 Manipur Board
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A train 100 m long is moving with a velocity of 60 km/hr. Find the time it takes to cross the bridge 1 km long. 

Total distance to be travelled, s = 100 + 1000 = 1100 m 


Velocity, v = 60 km/hr = 50/3 m/s 

Therefore, 

Time taken to cross the bridge, t = straight s over straight v space equals space fraction numerator 1100 over denominator bevelled 50 over 3 end fraction space equals space 66 space sec 


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