Question

It is a common observation that rain clouds can be at
about 1 km altitude above the ground. If a rain drop
falls from such a height freely under gravity, then what
will be its speed in km h'?
(Take g= 10 m s?)​

Answer 1

Neglecting air resistance,
And using
v^2=u^2 + 2as
u=0 , a = 10 , s=1000
v^2 = 2*10*1000
v^2 = 20000
Or v = 100root(2) = 141m/s(approx)


Hope you understood

Answer 2

here we use the equation of motion 3rd ...