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(a) If a train traveling at 72 km//h is ...

(a) If a train traveling at `72 km//h` is to be brought to rest in a distance of `200 m`, find the deceleration.
(b) The velocity of a bullet is reduced from `200 m//s` to `100 m//s` while traveling through a wooden block of thickness `10 cm`. Find the retardation (assuming it ti be uniform).

A

`20 ms^(-2)`

B

`10 ms^(-2)`

C

`2 ms^(-2)`

D

`1 ms^(-2)`

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The correct Answer is:
D
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