Question

A driver applies brakes when he sees a child on the railway track, the speed of the train reduces from 54 km/hr to 18 km/hr in 5 seconds. What is the distance travelled by the train during this interval of time.

Answer 1

Hello Friend...

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The answer of u r question is...

Initial speed=u

Final speed =v

Time taken =t
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Given,

u= 54 km/hr

v= 18km/hr

t= 5 second.

(60×60) hr=5/3600 hr..


calculate acceleration..

a=(v-u)/t
=(18-54)/(5/3600)
=-25920 km/hr square..

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Equation of motion ...

s=(ut)+(1/2) at 2
s=(54×5/3600)+(1/2)(-25920)(5/3600)2
= 50 m

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so the answer is 50 m

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Thank you..⭐️⭐️⭐️

Answer 2

Hey Mate! Here's ur answer.

I Hope It Helps.....☺️