Question

if a train travelling at 72 km /hr is brought to be a rest in 200m then its retardation is ​

Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

u=72

h

km

=72×

18

8

=20m/s

NOw v

2

=u

2

+2as

0=(20)

2

+2a(200)

0=400+400a

400a=−400

retardation =−a=1m/s

2