Height,h= 20m
"gently dropped" means initial velocity, u, =0m/s
Uniform acceleration, g=10m/s²
using the formula v²=u²+2gs
Substituting, v²=0²+2*10*20
v²=400
v=
[tex] \sqrt{400} [/tex]
v=20m/s
Time, t at which is strike the ground
using the formula v=u+at
Substituting, 20=0+10t
20=10t
t=2s
This means that the bank strike the ground with a velocity of 20m/s in 2s.
