6. a) A train 100m long is moving with a constant velocity of 60 km/h. find the time it takesto cross the bridge 1 km long.b) The slope of the line on a position time graph reveals information about an objectâs velocity. What conclusion can you draw regarding the motion of an object, if the graph is?i) a horizontal line ii) a straight diagonal line iii) a curved line
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Given,
Length off the train = 100m = 100/1000 = 0.1 km.
Speed of the train = 60 km/h.
Length of the bridge = 1 km.
So distance train will travel = 0.1 / 1 km = 1/10 km.
So, time taken = distance / speed
= 1 / (10 * 60)
= 1 / 600
= 0.0067 hrs.
Length off the train = 100m = 100/1000 = 0.1 km.
Speed of the train = 60 km/h.
Length of the bridge = 1 km.
So distance train will travel = 0.1 / 1 km = 1/10 km.
So, time taken = distance / speed
= 1 / (10 * 60)
= 1 / 600
= 0.0067 hrs.
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