A man can run at a speed of 5 m/s in still air. If he runs in a direction opposi

Practice Questions

Q1
A man can run at a speed of 5 m/s in still air. If he runs in a direction opposite to the wind blowing at 2 m/s, what is his effective speed?
  1. 3 m/s
  2. 5 m/s
  3. 7 m/s
  4. 10 m/s

Questions & Step-by-Step Solutions

A man can run at a speed of 5 m/s in still air. If he runs in a direction opposite to the wind blowing at 2 m/s, what is his effective speed?
  • Step 1: Identify the speed of the man running in still air, which is 5 m/s.
  • Step 2: Identify the speed of the wind, which is blowing at 2 m/s.
  • Step 3: Since the man is running in the opposite direction to the wind, we need to subtract the speed of the wind from the speed of the man.
  • Step 4: Perform the calculation: 5 m/s (speed of man) - 2 m/s (speed of wind) = 3 m/s.
  • Step 5: The result, 3 m/s, is the effective speed of the man when running against the wind.
  • Relative Speed – Understanding how to calculate effective speed when two speeds are acting in opposite directions.
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