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Question 1:

Which type of friction occurs when an object moves through a fluid?

A) Fluid friction
B) Rolling friction
C) Sliding friction
D) Static friction

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Explanation: The correct answer is A) Fluid friction. Fluid friction, also known as drag, occurs when an object moves through a fluid, such as air or water. It opposes the motion of the object and depends on factors such as the shape and speed of the object and the viscosity of the fluid.

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Question 2:

Which factor does not affect fluid friction?

A) The speed of the object
B) The shape of the object
C) The viscosity of the fluid
D) The weight of the object

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Explanation: The correct answer is D) The weight of the object. The factors that affect fluid friction include the speed of the object, the shape of the object, and the viscosity of the fluid. However, the weight of the object, which is the force due to gravity acting on it, does not directly affect fluid friction.

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Question 3:

What happens to fluid friction as the speed of an object moving through a fluid increases?

A) Fluid friction increases
B) Fluid friction decreases
C) Fluid friction remains the same
D) It depends on the viscosity of the fluid

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Explanation: The correct answer is A) Fluid friction increases. As the speed of an object moving through a fluid increases, the fluid friction, or drag force, also increases. This is because at higher speeds, there is more interaction between the object and the fluid molecules, resulting in greater resistance to the motion of the object.

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Question 4:

Which type of fluid friction can be reduced by shaping an object in a streamlined manner?

A) Laminar friction
B) Turbulent friction
C) Both laminar and turbulent friction
D) Neither

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Explanation: The correct answer is A) Laminar friction. Shaping an object in a streamlined manner can reduce laminar friction. Laminar friction occurs when the fluid flows in smooth, parallel layers. By reducing turbulence and maintaining laminar flow around the object, the drag force can be minimized, allowing for more efficient movement through the fluid.

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Question 5:

Which of the following factors does not affect the magnitude of fluid friction?

A) The viscosity of the fluid
B) The density of the fluid
C) The velocity of the fluid
D) The shape of the object

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Explanation: The correct answer is D) The shape of the object. The magnitude of fluid friction, or drag force, depends on factors such as the viscosity of the fluid, the density of the fluid, and the velocity of the fluid. However, the shape of the object does not directly affect the magnitude of fluid friction. Although the shape indirectly affects the drag force, it does not determine its magnitude in isolation.