a train travels at a constant speed of 36 km/h to 72km/h in 20sec .find the distance travelled by it
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v^2 = u^2 + 2as.. (1)
a= v-u/t
u = 36*5/18 = 10m/s
v = 72*5/18 = 20m/s
a = 10/20 = 0.5m/s ^2
now, v^2 = u^2 + 2as
400 = 100 + 2*0.5 *s
s = 300m
a= v-u/t
u = 36*5/18 = 10m/s
v = 72*5/18 = 20m/s
a = 10/20 = 0.5m/s ^2
now, v^2 = u^2 + 2as
400 = 100 + 2*0.5 *s
s = 300m
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