Question
State two factors which affect frictional force of a body.
Answer
1. Nature of Surfaces: The type of materials in contact and their surface properties play a significant role in determining friction. Rough surfaces typically exhibit higher frictional forces compared to smooth surfaces.
2. Normal Force: The normal force, which is the force exerted by a surface perpendicular to the contact area, affects friction. Greater normal force usually results in greater frictional force.
3. Surface Area in Contact: The size of the contact area between two surfaces can affect friction. In general, a larger contact area can result in greater friction, although this relationship is not always linear.
4. Lubrication: The presence of a lubricant (such as oil or grease) between two surfaces can significantly reduce friction by creating a slippery layer that separates and reduces direct contact between the surfaces.
2. Normal Force: The normal force, which is the force exerted by a surface perpendicular to the contact area, affects friction. Greater normal force usually results in greater frictional force.
3. Surface Area in Contact: The size of the contact area between two surfaces can affect friction. In general, a larger contact area can result in greater friction, although this relationship is not always linear.
4. Lubrication: The presence of a lubricant (such as oil or grease) between two surfaces can significantly reduce friction by creating a slippery layer that separates and reduces direct contact between the surfaces.
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