Question

An object O is moving towards the surface of water
with a speed of 2 ms-1 and fish F is moving towards
the surface with a speed of 5 ms-1. Find the speed
of the object O as seen by fish.
0.2 ms
My = 2
5 m/sſ
Hy = 4/3
F​

Answer 1

Speed of O = 2.25 m/s

Explanation:

Speed of object O wrt to fish is 2 m/s

Speed of fish = 5 m/s

Speed wrt to stationary observer in water is 5 − 2 = 3 m/s

Actual speed of object O wrt fish is 3 / μ ​= ​3/ (4/3) ​ = 9/4 = 2.25 m/s