A moving train is brought to rest within 20sec by applying breaks. Find the initial velocity, if the retardation due to break 2meater/second?
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v= 0
t = 20 sec
a = - 2 m/s²
From 1st equation of motion,
v=u+at
⇒0 = u + (-2)×20
⇒u = 40 m/s
∴Initial velocity is 40 m/s
t = 20 sec
a = - 2 m/s²
From 1st equation of motion,
v=u+at
⇒0 = u + (-2)×20
⇒u = 40 m/s
∴Initial velocity is 40 m/s
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