Answer to Question #98987 in Mechanics | Relativity for Hazel Ruth Paz

Question

A man wants to know the velocity of current flow at pasig river. He used a motor boat with a known speed of 400 meter/minute. He clocked 5 minutes downstream and clocked 7 minutes upstream. Determine the distance covered. Determine the current flow.

Answer 1

We have

$$(v+u)t_1=(v-u)t_2$$

$$(400+u)5=(400-u)7$$

$$u=\frac{200}{3}\frac{m}{min}=\frac{200}{3}\frac{m}{60s}=1.1\frac{m}{s}$$