Which of the following is not an example of sliding friction?a)Rubbing...
The term sliding friction refers to the resistance created by two objects sliding against each other. This can also be called kinetic friction.
Examples:
a) Rubbing both hands together to create heat
b) A washing machine pushed along a floor
c) A card and an envelope when the card is being slid into the envelope
However, option (d) is the example of Rolling friction.
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Which of the following is not an example of sliding friction?a)Rubbing...
The correct answer is option D: An object moving through a fluid like water.
Explanation:
Sliding friction is a type of friction that occurs when two solid surfaces slide against each other. It is the force that opposes the motion of one surface over another. It is also known as kinetic friction. Sliding friction can be observed in various everyday situations, but it does not occur when an object is moving through a fluid like water.
Let's examine each option to understand why option D is the correct answer:
a) Rubbing both hands together to create heat:
- When you rub both hands together, the friction between your hands generates heat. This is an example of sliding friction because the surfaces of your hands are in contact and sliding against each other.
b) A washing machine pushed along a floor:
- When you push a washing machine along a floor, the wheels or feet of the machine come into contact with the floor. The friction between the wheels or feet and the floor opposes the motion of the washing machine. This is an example of sliding friction.
c) A card and an envelope when the card is being slid into the envelope:
- When you slide a card into an envelope, the surfaces of the card and the envelope come into contact and slide against each other. The friction between the card and the envelope opposes the motion of the card. This is an example of sliding friction.
d) An object moving through a fluid like water:
- When an object moves through a fluid like water, there is no sliding friction involved. Instead, the resistance to the motion of the object is due to a different type of friction called fluid friction or drag. Fluid friction arises from the interaction between the object and the fluid molecules surrounding it. It is different from sliding friction, which occurs between solid surfaces.
In summary, option D is not an example of sliding friction because it involves an object moving through a fluid like water, which is characterized by fluid friction or drag, not sliding friction.