Question
a train is moving with a velocity of 30m/s. When brakes are applied , it is found that the velocity reduces to 10m/s in 240m.
When the velocity of the train becomes zero , the total distance travelled is??
270m
Joshi sir comment
by v2 = u2-2as
100 = 900-2*a*240
or 800 = 480a
or a = 80/48 = 10/6 = 5/3
so total distance upto rest is u2/2a = 900*3/2*5 = 270m