Which of the following is correct regarding fluid friction?
I. When objects move through fluids they lose energy due to it.
II. It can be minimised by giving suitable shapes to bodies moving in fluids.
Show answer & explanation
Correct answer: C
Explanation
Correct Answer:
Option 3: Both I and II
Explanation:
Fluid friction is the force that opposes the motion of an object moving through a fluid such as air or water. It is also known as drag. When an object moves through a fluid, it loses some of its energy due to friction, slowing down its motion, making statement I correct.
Statement II is also correct because fluid friction can be minimized by giving streamlined shapes to objects. This reduces resistance. Examples include airplanes, ships, and cars designed with aerodynamic shapes. This is an important concept in physics and engineering.
Additional Facts:
Option 1: Only I is incorrect because II is also correct.
Option 2: Only II is incorrect because I is also correct.
Option 4: Neither is incorrect because both are correct.
Probable Exam Questions:
Q: What is fluid friction also called?
A: Drag
Q: Friction is what type of force?
A: Contact force
Q: How can friction be reduced?
A: By streamlining bodies
Q: Air resistance is an example of what?
A: Fluid friction