Question

A 25.0 kg box of textbooks rests on a loading ramp making an angle α with the horizontal. Given coefficients of kinetic and static friction, what forces come into play and how do they affect the motion of the box?

Answer 1

When a box rests on a loading ramp, several forces come into play and affect its motion, including the weight, normal force, and frictional forces. The frictional forces are categorized as static friction and kinetic friction. If the applied force is greater than the maximum static frictional force, the box will start moving.

Step-by-step explanation:

When a box rests on a loading ramp, several forces come into play and affect its motion. The forces include the weight of the box acting vertically downwards, the normal force exerted by the ramp perpendicular to it, and the frictional forces. The frictional forces can be further categorized into static friction, which prevents the box from moving initially, and kinetic friction, which opposes the motion of the box once it starts moving. The static frictional force is determined by the coefficient of static friction and the normal force, while the kinetic frictional force is determined by the coefficient of kinetic friction and the normal force. If the applied force is greater than the maximum static frictional force, the box will start moving and the kinetic frictional force will come into play.