A train staring from rest attain a velocity of 80km/h in 4 minutes . Find acceleration and distance travelled by the train
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In this type of questions at first convert all given into SI units.
80 Kmh-¹ = (80×5/18) ms-¹ = 22.2 ms-¹
4 min = 240 s
Whenever any body starts from rest then its Initial Velocity becomes zero.
v = u + at
22.2 = 0 + 240a
a = 22.2/240
a = 0.0925 ms-²
S = ut + 1/2at²
S = 0 + 1/2 × 0.0925 x 240
S = 11.1 m
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