Question

a stone Falls from the top of a building and travels 53.9 in the last second before it reaches the ground find the height of the building​

Answer 1

Answer:

149.225m

Explanation:

as we know the final vel of stone is 53.9m/s and g=9.8m/s^2

we can calculate the time taken to attain this vel by the formula of acc , it will be 5.5 secs

now, hieght= initial vel× time+ 1/2×final vel×(time)^2

initial vel is 0

than from this formula we can get the required ans

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