Friction & Inclined Planes

Front

What is the Normal Force on an object on an inclined plane?

Back

The Normal Force (F_N) is the force exerted by a surface that supports the weight of an object resting on it, acting perpendicular to the surface. For an object on an incline, F_N = mg cos(ϴ).

Front

How does the angle of an incline affect the Normal Force?

Back

As the angle of the incline (ϴ) increases, the Normal Force decreases because it is calculated as F_N = mg cos(ϴ).

Front

What is the relationship between weight and the components of weight on an incline?

Back

The weight of an object can be resolved into two components on an incline: parallel to the incline (F_parallel = mg sin(ϴ)) and perpendicular to the incline (F_perpendicular = mg cos(ϴ)).

Front

What is friction?

Back

Friction is a force that opposes the relative motion of two surfaces in contact. It acts parallel to the surfaces and can be static or kinetic.

Front

What is static friction?

Back

Static friction is the force that keeps an object at rest when a force is applied, preventing it from moving. It must be overcome for motion to occur.

Front

What is kinetic friction?

Back

Kinetic friction is the force that opposes the motion of two surfaces sliding past each other. It is usually less than static friction.

Front

How do you calculate the force of friction?

Back

The force of friction (F_f) can be calculated using the formula F_f = μF_N, where μ is the coefficient of friction and F_N is the Normal Force.

Front

What is the coefficient of friction?

Back

The coefficient of friction (μ) is a dimensionless value that represents the ratio of the force of friction between two bodies and the Normal Force pressing them together.

Front

What happens to the Normal Force on a frictionless incline?

Back

On a frictionless incline, the Normal Force still acts perpendicular to the surface, but there is no frictional force opposing motion.

Front

How do you determine the direction of the frictional force on an incline?

Back

The direction of the frictional force on an incline opposes the direction of motion or impending motion of the object.