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So this is a bit embarassing. But I enrolled in community college. I really can't wrap my head around vectors or friction. What books useful eh? I'm French btw
Vectors are mathematical quantities that have both magnitude and direction. They are used in physics to represent physical quantities such as forces, velocities, and accelerations. They are typically represented graphically as arrows, with the length of the arrow representing the magnitude and the direction of the arrow representing the direction.
Friction is a force that opposes the motion of objects when they come into contact with each other. It can cause objects to slow down or stop moving. The amount of friction depends on the type of surfaces in contact and the force pushing them together. In some cases, friction can also cause objects to move in a different direction than the applied force.
The direction of frictional force is always opposite to the direction of motion or the intended direction of motion. This means that if an object is moving to the right, the frictional force will act to the left. If an object is at rest, the frictional force will act in the opposite direction to any applied force.
The magnitude of frictional force can be calculated using the formula Ff = μN, where Ff is the frictional force, μ is the coefficient of friction, and N is the normal force. The coefficient of friction is a constant that depends on the type of surfaces in contact, while the normal force is the force that is perpendicular to the surface of contact.
There are a few ways to reduce frictional force. One way is to use a lubricant, such as oil or grease, to reduce the contact between surfaces. Another way is to use materials with lower coefficients of friction, such as smooth surfaces or materials with a slick coating. Additionally, reducing the force pushing the surfaces together can also reduce frictional force.