River Crossing: Solving for Time with Jon's Boat Speed and River Current

In summary, the conversation discusses the factors that influence Jon's boat rowing across a river. The river is moving at 6m/s and Jon is moving at 4m/s. The question is how long it will take for Jon to row across the river, and the equation for this is t=d/v. The direction of the rower and river can change the outcome of the question.
  • #1
cubs1908
2
0
if jon rows a boat at 4m/s the river is moving at 6m/s and the river is 300m how long does it take to row across. I need the equation
 
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  • #2
cubs1908 said:
if jon rows a boat at 4m/s the river is moving at 6m/s and the river is 300m how long does it take to row across. I need the equation

think about the reference frames. if you're standing aside, how fast is the river moving? how fast is the boat moving? which is moving faster, slower?

think about it from jon's point of view. if he does no work, how fast is he moving? how fast are you moving if he is observing you? he is doing work, so how is he moving in comparison to you and the river?

hopefully that helps
 
  • #3
Rather then trying to find the equation, i suggest you try to understand what's happening in the problem. First of all, what is jons goal? What factors influence how this happens?
 
  • #4
this question can change drastically with the direction of the rower and river. Are they in the same direction? Are the forces perpendicular?

t=d/v
 
Last edited:
  • #5
thanks alot
 

FAQ: River Crossing: Solving for Time with Jon's Boat Speed and River Current

How does the "Help me cross the river" puzzle work?

The "Help me cross the river" puzzle is a classic logic problem that requires the player to use deductive reasoning and critical thinking to come up with a solution. The objective of the puzzle is to figure out how to get a group of people or objects across a river using a limited set of resources and following certain rules.

What are the basic rules of the "Help me cross the river" puzzle?

The basic rules of the "Help me cross the river" puzzle vary depending on the specific version, but they generally involve a group of people or objects that need to be transported across a river using a small boat. The boat can only hold a certain number of people or objects at a time, and there may be restrictions on who can be in the boat together (e.g. certain people cannot be left alone together). The goal is to get everyone safely to the other side of the river.

How can I solve the "Help me cross the river" puzzle?

Solving the "Help me cross the river" puzzle requires a combination of logical thinking and trial and error. Start by identifying any restrictions or limitations in the puzzle and use those to guide your decisions. It can also be helpful to draw out a diagram or make a list of all the possible combinations of people or objects that can be transported in the boat. With some persistence and creative problem-solving, you should be able to find a solution.

Are there any variations of the "Help me cross the river" puzzle?

Yes, there are many variations of the "Help me cross the river" puzzle, with different numbers of people or objects, different rules and restrictions, and different scenarios. Some versions may also involve other elements such as a time limit or a specific sequence of people or objects that need to be transported. The key to solving any variation of the puzzle is to carefully analyze the rules and use deductive reasoning to find a solution.

What skills does the "Help me cross the river" puzzle help develop?

The "Help me cross the river" puzzle is a great exercise for developing critical thinking, problem-solving, and deductive reasoning skills. It also requires patience and persistence, as finding the solution may take several attempts. Additionally, the puzzle can be a fun and engaging way to improve teamwork and communication skills, as it can be solved collaboratively with others.

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