Two cars are travelling towards each other at speed of 20 ~m ~s ⁻¹ each. When the cars are 300 ~m apart, both the drivers apply brakes and the cars retard at the rate of 2 ~m ~s ⁻² . The distance between them when they come to rest is :

Question

Quantrex Academy · Accepted Answer

Correct answer: B. 100 ~m

aligned & | u _ BA |=40 ~m / s & | a _ BA |=4 ~m / s & Apply ( v ^2= u ^2+2 as )_ relative & O =(40)^2+2(-4)( S ) & S =200 ~m & Remaining distance =300-200=100 ~m aligned

Two cars are travelling towards each other at speed of 20 ~m ~s ⁻¹ each. When the cars are 300 ~m apart, both the drivers apply brakes and the cars retard at the rate of 2 ~m ~s ⁻² . The distance between them when they come to rest is :

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Correct answer

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