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The frictional resistance for fluids in motion is
  • a)
    inversely proportional to the square of the surface area of contact
  • b)
    inversely proportional to the surface area of contact
  • c)
    proportional to the square of the surface area of contact
  • d)
    proportional to the surface area of contact 
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
The frictional resistance for fluids in motion isa)inversely proportio...
Explanation: According to the laws of fluid friction, the frictional resistance is proportional to the surface area of contact for both laminar and turbulent flows.
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The frictional resistance for fluids in motion isa)inversely proportio...
Frictional resistance for fluids in motion

Frictional resistance is the force that opposes the motion of a fluid through a surface. It is caused by the interaction between the fluid and the surface it is in contact with. The frictional resistance for fluids in motion is proportional to the surface area of contact.

Proportional to surface area of contact

The frictional resistance for fluids in motion is proportional to the surface area of contact. This means that if the surface area of contact between the fluid and the surface increases, the frictional resistance will also increase. Similarly, if the surface area of contact decreases, the frictional resistance will decrease.

Effect on flow rate

The frictional resistance for fluids in motion has a significant effect on the flow rate of the fluid. As the frictional resistance increases, the flow rate of the fluid decreases. This is because the fluid has to overcome a greater resistance to flow through the surface.

Applications

The knowledge of frictional resistance for fluids in motion is essential in various applications. For example, in the design of pipes, the frictional resistance is taken into consideration to determine the size of the pipe required for a particular flow rate. Similarly, in the design of pumps, the frictional resistance is also taken into consideration to determine the power required to overcome the resistance and maintain the desired flow rate.

Conclusion

In conclusion, the frictional resistance for fluids in motion is proportional to the surface area of contact. It has a significant effect on the flow rate of the fluid and is essential in various applications.
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The frictional resistance for fluids in motion isa)inversely proportional to the square of the surface area of contactb)inversely proportional to the surface area of contactc)proportional to the square of the surface area of contactd)proportional to the surface area of contactCorrect answer is option 'D'. Can you explain this answer?
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