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MHT CET2019Evening ShiftPhysicsMechanical Properties of FluidsActual

Two light balls are suspended as shown in figure. When a stream of air passes through the space between them, the distance between the balls will

Options

  1. ARemain same
  2. BIncrease
  3. CMay increase or decrease, depending on speed of air
  4. DDecrease

Correct answer

D. Decrease

Step-by-step solution

When a stream of air passes through the space between the balls, the pressure reduces between them as compared to the atmospheric pressure on either side. So, according to Bernoulli’s theorem, the pressure energy should be constant and is compensated by movement of balls toward each other. So, the distance between the balls will decrease.

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