Question

a train accelerates uniformly from 86 km per hour to 72 km per hour in 20 seconds find the distance travelled

Answer 1

a=v - u 
------
t
= 72 * 5/18 - 36 * 5/18 
--------------------------
20
= 10/20
= 1/2 m/square
2aS = v sq. - u sq.
S = 400 - 100 = 300m
distance = 300 m

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