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A swimmer can swim at 3 m/s in still water. If the river flows at 2 m/s, what is

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Question: A swimmer can swim at 3 m/s in still water. If the river flows at 2 m/s, what is the swimmer\'s speed relative to the bank when swimming upstream?

Options:

  1. 1 m/s
  2. 2 m/s
  3. 3 m/s
  4. 5 m/s

Correct Answer: 1 m/s

Solution: 

Speed relative to bank = Speed of swimmer - Speed of river = 3 m/s - 2 m/s = 1 m/s.

A swimmer can swim at 3 m/s in still water. If the river flows at 2 m/s, what is

Practice Questions

Q1
A swimmer can swim at 3 m/s in still water. If the river flows at 2 m/s, what is the swimmer's speed relative to the bank when swimming upstream?
  1. 1 m/s
  2. 2 m/s
  3. 3 m/s
  4. 5 m/s

Questions & Step-by-Step Solutions

A swimmer can swim at 3 m/s in still water. If the river flows at 2 m/s, what is the swimmer's speed relative to the bank when swimming upstream?
  • Step 1: Understand that the swimmer's speed in still water is 3 m/s.
  • Step 2: Know that the river flows at a speed of 2 m/s.
  • Step 3: When swimming upstream, the swimmer is swimming against the flow of the river.
  • Step 4: To find the swimmer's speed relative to the bank, subtract the speed of the river from the swimmer's speed.
  • Step 5: Perform the calculation: 3 m/s (swimmer's speed) - 2 m/s (river's speed) = 1 m/s.
  • Step 6: Conclude that the swimmer's speed relative to the bank when swimming upstream is 1 m/s.
  • Relative Speed – Understanding how to calculate the speed of an object in relation to another moving object.
  • Vector Addition – Applying vector subtraction when dealing with opposing directions (swimmer vs. river current).
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