Una estudiante intenta trasladar una mininevera de 30 kg a su dormitorio. Durante un momento de

step 1 We want to identify what forces are being acted upon the mini -fridge. We see that we have gravi

Una estudiante intenta trasladar una mininevera de 30 kg a...

Una estudiante intenta trasladar una mininevera de $30 \mathrm{~kg}$ a su dormitorio. Durante un momento de desatención, la mininevera se desliza por una pendiente de 35 grados a rapidez constante cuando ella aplica una fuerza de $25 \mathrm{~N}$ que actúa hacia arriba y en paralelo a la pendiente. ¿Cuál es el coeficiente de fricción cinética entre la nevera y la superficie de la pendiente?

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Key Concepts

Kinetic Friction

Kinetic friction is the resistive force that opposes the motion of two surfaces sliding against each other. It is proportional to the normal force, with the coefficient of kinetic friction being the constant of proportionality, allowing one to quantify the frictional force for a given normal force.

Newton's Second Law of Motion

This fundamental principle states that the net force acting on an object is equal to the product of its mass and acceleration. When an object moves at constant speed, its acceleration is zero, meaning the total forces acting on it are balanced.

Force Decomposition on an Inclined Plane

When dealing with an inclined plane, gravitational force is split into two components: one perpendicular to the surface and one parallel to it. The parallel component influences motion along the slope while the perpendicular component determines the normal force, which is critical for calculating friction.

Equilibrium in Constant Velocity Motion

In situations where an object moves at a constant speed, the forces along the direction of motion must sum to zero. This static equilibrium condition enables the calculation of unknown forces such as friction or applied forces by ensuring that all driving and resisting forces are balanced.

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