A moving train is brought to rest with in 20sec. by applying brakes find initial velocity
if the Retardation due to brakes is 1.5m/s2
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Answer: 40 m/s^2
Explanation:
Given:
Final Velocity (v) = 0
Time taken (t) = 20 s
Acceleration (a) = 2 m/ s^2
From the equation,
(v) = (u)+a×t
= u = v-a×t
= u = 0 - (2)×20
= u = 0- 30
= u = 30m/s^2
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