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A car runs along a horizontal straight road at a speed of 20 m/sec. A person in it observes the rain hitting his car at 60° to the vertical. If the rain is actually falling vertically, the speed of the raindrops is nearly:  

  1. 34.6 m/sec
  2. 11.55 m/sec
  3. 10 m/sec
  4. 23.1 m/sec

Answer (Detailed Solution Below)

Option 2 : 11.55 m/sec
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Detailed Solution

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CONCEPT:

  • Velocity is the rate of change of displacement of the body and is given by

Where dx = Rate of change in position, dt = change in time

EXPLANATION:

 

From the triangle

  • Hence, option 2 is the answer

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