Question

Anyone solve this question

Answer 1

16m.
If 8m is covered after applying breaks from 30km/hr to 0 km/hr.So obviously 16m will be covered to bring th3 vehicle to rest from 60km/hr.

Answer 2

First we convert km/h into m/s
because everything is given in metres
acceleration is negative here because it is opposing the motion or you can say it is acting as retardation.
acceleration is same for both cases..
Hope you understand
Thanks.