- #1

yashboi123

- 17

- 0

- Homework Statement
- A river flows due south with a speed of 2.5 m/s. You steer a motorboat across the river; your velocity relative to the water is 5.2 m/s due east. The river is 650 m wide.

How far south of your starting point will you reach the opposite bank?

- Relevant Equations
- Δ x = v 0 t + 1 2 a t 2

v = v 0 + a t

Δ x/ Δt = v

The correct answer is obtained by rearranging Δ x/ Δt = v. However, I assumed there would be some acceleration in the y direction so I tried to use the kinematic equations. To find the time I simply rearranged Δ x/ Δt = v, assigning v=5.2 m/s and Δ x = 650. I assumed there is no acceleration in the x/east direction, but why is there no acceleration in the y/southern direction?