Practice Stokes’ Law - 9.5.1 | 9. MECHANICAL PROPERTIES OF FLUIDS | CBSE 11 Physics Part 2
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9.5.1 - Stokes’ Law

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Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What is Stokes’ Law?

💡 Hint: Think about forces acting in opposite directions.

Question 2

Easy

What is terminal velocity?

💡 Hint: Consider when acceleration stops.

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Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What does Stokes’ Law relate to?

  • Pressure in a fluid
  • Viscous drag force
  • Thermal energy

💡 Hint: Think about what the law is mathematically describing.

Question 2

True or False: Terminal velocity is reached when the net force acting on an object is zero.

  • True
  • False

💡 Hint: Consider the forces acting together on the object.

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Challenge Problems

Push your limits with challenges.

Question 1

A basketball of radius 12 cm falls through a substance with a viscosity of 10 kg/(m.s). Calculate its terminal velocity, given that the density of the basketball is 0.6 kg/m³ and the density of the substance is 1.2 kg/m³.

💡 Hint: Substitute the values correctly and pay attention to unit conversions.

Question 2

A sphere falls through a viscous liquid at a velocity of 2 m/s. If the density of the sphere is 3000 kg/m³ and the density of the liquid is 1000 kg/m³, calculate how changing the radius of the sphere to half affects the terminal velocity.

💡 Hint: Focus on how radius affects the outcome in the terminal velocity formula.

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