Question

Water drops fall at regular intervals from a roof at of
125m
from the ground. At an instant when 11th
drop is about leave the roof and 1st
drop is at a height of 45m
from the ground at that instant the dist of 10th
drop from the roof is
(g=10m/s2)

Answer 1

Answer:

1.25m

Explanation:

as there are 11 drops there are 10 time intervals

total time =root  2h/g = root 2x250/g =5 sec

so each time interval=5/10=1/2sec

now the distance travelled by 10th drop  ; h of 10th drop=1/2gt2=1/2 x g x( 1/2)2 = 1.25m