Question

If you were trying to cross a river with the shortest possible time, would you aim your boat slightly upstream, directly across the river, or slightly downstream?

Answer 1

I would say downstream since the stream can push your boat, then you would have momentum and would just have to row towards the land.

Answer 2

Since the creek can push your boat, I would recommend downstream. You would then have momentum and only need to row toward the land.

What is the relative velocity of boat with respect to water?

• The observer's velocity, for example, while floating on an inner tube and drifting downstream with the current, can be used to calculate the boat's velocity in relation to the water, or vBW.
• The boat flows downstream with the current when the engine is shut off, and vBW is zero.

How does river velocity affect time to cross the river?

• The time it takes to cross a river is unaffected by the river's velocity because it is parallel to the boat's motion in a crosswise direction.
• The time to cross the river will not be impacted by any changes in river velocity.

What affects the velocity of a river?

• Numerous factors affect a river's velocity, including the channel's form, the grade of the slope it travels over, the amount of water it carries, and the amount of friction brought on by jagged edges in the riverbed.

Learn more about  river velocity here:

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