a train starting from rest attains a velocity of72km/h in 5seconds assuming that the accelaration is uniform 1 accelaration 2 distance travell by the train for attaining this velocity
Answers
Answer:
A train starting from rest attains a velocity of 72 km/h in 5 minutes.Assuming that the acceleration is uniform, find (i) the acceleration and (ii) thedistance travelled by the train for attaining this velocity. ... Distancecovered by first car before coming torest is equal to Are of traingle AOB.
Explanation:
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Answer:
Given:-
Initial velocity (u) = 0
Final velocity (v) = 72km/hr = 20m/s
Time = 5sec
To find:-
(i) Accleration
By applying v - u = at
20 - 0 = a×5
20 = 5a
a = 20/5
= 4m/s^2.
(ii) Distance
By applying v^2-u^2 = 2as
400 - 0 = 2×4×s
400 = 8s
S = 400/8
= 50m.