An eagle drops a fish from the top of a bridge while a perso

An eagle drops a fish from the top of a bridge while a person below measures the time to strike the water. How long does it take to fall if the bridge is 5 meters above the water? What was the velocity of the fish when it hits the water?

Time = XXX seconds

Velocity = XXX meters/second

Solution

Height = 5mt ; acc due to gravity = 9.81 mt/sec^2

intial velocity, u =0

So, h = ut +1/2gt^2

h = 0 +1/2gt^2

t = sqrt(2h/g) = sqrt(2*5/9.81)

= 1.01 sec

Velocity before it hits water: v = u+gt

v = gt = 9.81*1.01 = 9.9 mt/sec