a moving train brought to rest with in 20 sec by applying brakes find the initial velocity if the retardation due to brakes is 2m/sec^2
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v=0m/s
t=20s
Let initial velocity be u
Since acceleration acts in opposite direction of retardation
Therefore a=-2m/s^2
Applying first equation of motion:
v=u+at
u=2(20)=40m/s
t=20s
Let initial velocity be u
Since acceleration acts in opposite direction of retardation
Therefore a=-2m/s^2
Applying first equation of motion:
v=u+at
u=2(20)=40m/s
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