Hey
According to the question,
Initial velocity = 18kmh-¹ = 5ms-¹ Final velocity = 0ms-¹ time = 5sec
a = 0-5/5 a = -1ms-²
Here, -ve sign shows retardation 2as = v²-u² 2×(-1)s = 0²-5² -2s = -25 s = 12.5m
Hope you understood and got your solution to the question asked.
Thanks
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